minor #19567 [Testing] Change PHPUnit URLs (tony-tran)

This PR was merged into the 6.4 branch.

Discussion
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[Testing] Change PHPUnit URLs

Hi,

Page : https://symfony.com/doc/6.4/testing.html
URL it's ok on 5.x branch.
I'm not sure about the version of phpunit for the url to add (the latest is 11.0).

Commits
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6b5c537 [Testing] Change PHPUnit URLs

Author: javiereguiluz

testing.rst

@@ -1189,8 +1189,8 @@ Learn more
 
 .. _`PHPUnit`: https://phpunit.de/
 .. _`documentation`: https://docs.phpunit.de/
-.. _`Writing Tests for PHPUnit`: https://docs.phpunit.de/en/10.3/writing-tests-for-phpunit.html
-.. _`PHPUnit documentation`: https://docs.phpunit.de/en/10.3/configuration.html
+.. _`Writing Tests for PHPUnit`: https://docs.phpunit.de/en/10.5/writing-tests-for-phpunit.html
+.. _`PHPUnit documentation`: https://docs.phpunit.de/en/10.5/configuration.html
 .. _`unit test`: https://en.wikipedia.org/wiki/Unit_testing
 .. _`DAMADoctrineTestBundle`: https://github.com/dmaicher/doctrine-test-bundle
 .. _`Doctrine data fixtures`: https://symfony.com/doc/current/bundles/DoctrineFixturesBundle/index.html