minor symfony#52648 [Form] Add missing whitespace in Changelog (alexandre-daubois)

This PR was merged into the 7.1 branch.

Discussion
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[Form] Add missing whitespace in Changelog

| Q             | A
| ------------- | ---
| Branch?       | 7.1
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        | -
| License       | MIT

Commits
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dcca773 [Form] Add missing whitespace in Changelog

Author: nicolas-grekas

src/Symfony/Component/Form/CHANGELOG.md

@@ -4,7 +4,7 @@ CHANGELOG
 7.1
 ---
 
-* Deprecate not configuring the `default_protocol` option of the `UrlType`, it will default to `null` in 8.0
+ * Deprecate not configuring the `default_protocol` option of the `UrlType`, it will default to `null` in 8.0
 
 7.0
 ---