minor #32800 Improve some URLs (Arman-Hosseini)

This PR was squashed before being merged into the 3.4 branch (closes #32800).

Discussion
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Improve some URLs

| Q             | A
| ------------- | ---
| Branch?       | 3.4 <!-- see below -->
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| BC breaks?    | no     <!-- see https://symfony.com/bc -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tests pass?   | yes    <!-- please add some, will be required by reviewers -->
| Fixed tickets | N/A   <!-- #-prefixed issue number(s), if any -->
| License       | MIT
| Doc PR        | N/A <!-- required for new features -->

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Commits
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fab17a4487 Improve some URLs

Author: nicolas-grekas

Tests/AbstractEventDispatcherTest.php

@@ -267,7 +267,7 @@ public function testEventReceivesTheDispatcherInstanceAsArgument()
     }
 
     /**
-     * @see https://bugs.php.net/bug.php?id=62976
+     * @see https://bugs.php.net/62976
      *
      * This bug affects:
      *  - The PHP 5.3 branch for versions < 5.3.18