minor #3091 [Docs] Fix composer config to avoid modifying package.json automatically (Crovitche-1623)

This PR was squashed before being merged into the 2.x branch.

Discussion
----------

[Docs] Fix `composer config` to avoid modifying `package.json` automatically

| Q              | A
| -------------- | ---
| Bug fix?       | yes
| New feature?   | no
| Deprecations?  | no
| Documentation? | yes
| Issues         | Fix #3092
| License        | MIT

`@Kocal`

Commits
-------

1ca53c5 [Docs] Fix `composer config` to avoid modifying `package.json` automatically

Author: Kocal

src/Autocomplete/assets/README.md

@@ -14,7 +14,7 @@ composer require symfony/ux-autocomplete:2.23.0
 npm add @symfony/[email protected]
 ```
 
-**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config extra.symfony.flex.synchronize_package_json false`.
+**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config "extra.symfony/flex.synchronize_package_json" false`.
 
 ## Resources
 

src/Chartjs/assets/README.md

@@ -14,7 +14,7 @@ composer require symfony/ux-chartjs:2.23.0
 npm add @symfony/[email protected]
 ```
 
-**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config extra.symfony.flex.synchronize_package_json false`.
+**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config "extra.symfony/flex.synchronize_package_json" false`.
 
 ## Resources
 

src/Cropperjs/assets/README.md

@@ -14,7 +14,7 @@ composer require symfony/ux-cropperjs:2.23.0
 npm add @symfony/[email protected]
 ```
 
-**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config extra.symfony.flex.synchronize_package_json false`.
+**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config "extra.symfony/flex.synchronize_package_json" false`.
 
 ## Resources
 

src/Dropzone/assets/README.md

@@ -14,7 +14,7 @@ composer require symfony/ux-dropzone:2.23.0
 npm add @symfony/[email protected]
 ```
 
-**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config extra.symfony.flex.synchronize_package_json false`.
+**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config "extra.symfony/flex.synchronize_package_json" false`.
 
 ## Resources
 

src/LazyImage/assets/README.md

@@ -14,7 +14,7 @@ composer require symfony/ux-lazy-image:2.23.0
 npm add @symfony/[email protected]
 ```
 
-**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config extra.symfony.flex.synchronize_package_json false`.
+**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config "extra.symfony/flex.synchronize_package_json" false`.
 
 ## Resources
 

src/LiveComponent/assets/README.md

@@ -14,7 +14,7 @@ composer require symfony/ux-live-component:2.23.0
 npm add @symfony/[email protected]
 ```
 
-**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config extra.symfony.flex.synchronize_package_json false`.
+**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config "extra.symfony/flex.synchronize_package_json" false`.
 
 ## Resources
 

src/Notify/assets/README.md

@@ -14,7 +14,7 @@ composer require symfony/ux-notify:2.23.0
 npm add @symfony/[email protected]
 ```
 
-**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config extra.symfony.flex.synchronize_package_json false`.
+**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config "extra.symfony/flex.synchronize_package_json" false`.
 
 ## Resources
 

src/React/assets/README.md

@@ -14,7 +14,7 @@ composer require symfony/ux-react:2.23.0
 npm add @symfony/[email protected]
 ```
 
-**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config extra.symfony.flex.synchronize_package_json false`.
+**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config "extra.symfony/flex.synchronize_package_json" false`.
 
 ## Resources
 

src/Svelte/assets/README.md

@@ -14,7 +14,7 @@ composer require symfony/ux-svelte:2.23.0
 npm add @symfony/[email protected]
 ```
 
-**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config extra.symfony.flex.synchronize_package_json false`.
+**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config "extra.symfony/flex.synchronize_package_json" false`.
 
 ## Resources
 

src/Swup/assets/README.md

@@ -14,7 +14,7 @@ composer require symfony/ux-swup:2.23.0
 npm add @symfony/[email protected]
 ```
 
-**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config extra.symfony.flex.synchronize_package_json false`.
+**Tip:** Your `package.json` file will be automatically modified by [Flex](https://github.com/symfony/flex) when installing or upgrading a PHP package. To prevent this behavior, ensure to **use at least Flex 1.22.0 or 2.5.0**, and run `composer config "extra.symfony/flex.synchronize_package_json" false`.
 
 ## Resources