tweak --from-playground docs (#707)

* tweak --from-playground docs

* Fix syntax in sv create command example

Author: Rich-Harris

documentation/docs/20-commands/10-sv-create.md

@@ -14,12 +14,12 @@ npx sv create [options] [path]
 
 ### `--from-playground <url>`
 
-Create a SvelteKit project from a Svelte Playground URL. This downloads all playground files, detects external dependencies, and sets up a complete SvelteKit project structure with everything ready to go.
+Create a SvelteKit project from a [playground](/playground) URL. This downloads all playground files, detects external dependencies, and sets up a complete SvelteKit project structure with everything ready to go.
 
 Example:
 
 ```sh
-npx sv create --from-playground=https://svelte.dev/playground/hello-world
+npx sv create --from-playground="https://svelte.dev/playground/hello-world"
 ```
 
 ### `--template <name>`