Merge pull request #26660 from unasuke/fix_typo_in_5_0_release_notes

Fix typo in 5_0_release_notes.md doc [ci skip]

guides/source/5_0_release_notes.md

@@ -583,7 +583,7 @@ Please refer to the [Changelog][active-record] for detailed changes.
 
 *   Removed support for the legacy `mysql` database adapter from core. Most users should
     be able to use `mysql2`. It will be converted to a separate gem when when we find someone
-    to maintain it. ([Pull Request 1](https://github.com/rails/rails/pull/22642)],
+    to maintain it. ([Pull Request 1](https://github.com/rails/rails/pull/22642),
     [Pull Request 2](https://github.com/rails/rails/pull/22715))
 
 *   Removed support for the `protected_attributes` gem.