Update PULL_REQUEST_TEMPLATE.md

Synchronize from symfony/symfony

Author: smnandre

.github/PULL_REQUEST_TEMPLATE.md

@@ -2,15 +2,17 @@
 | ------------- | ---
 | Bug fix?      | yes/no
 | New feature?  | yes/no <!-- please update src/**/CHANGELOG.md files -->
-| Tickets       | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
+| Issues        | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
 | License       | MIT
 
 <!--
-Replace this notice by a short README for your feature/bugfix. This will help people
-understand your PR and can be used as a start for the documentation.
+Replace this notice by a description of your feature/bugfix.
+This will help reviewers and should be a good start for the documentation.
 
 Additionally (see https://symfony.com/releases):
  - Always add tests and ensure they pass.
- - Never break backward compatibility (see https://symfony.com/bc).
+ - For new features, provide some code snippets to help understand usage.
  - Features and deprecations must be submitted against branch main.
+ - Changelog entry should follow https://symfony.com/doc/current/contributing/code/conventions.html#writing-a-changelog-entry
+ - Never break backward compatibility (see https://symfony.com/bc).
 -->