minor #39060 [BrowserKit] [Browserkit] Add changelog entry for reques…

…t parameters string cast (chalasr)

This PR was merged into the 5.2 branch.

Discussion
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[BrowserKit] [Browserkit] Add changelog entry for request parameters string cast

| Q             | A
| ------------- | ---
| Branch?       | 5.2
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       | Fixes #38651, Fixes #38591
| License       | MIT
| Doc PR        | -

Commits
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ec80507 [Browserkit] Add changelog entry for request parameters string cast

src/Symfony/Component/BrowserKit/CHANGELOG.md

@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+5.2.0
+-----
+
+ * [BC BREAK] Request parameters are now casted to string in `Request::__construct()`.
+
 4.3.0
 -----