minor #15811 Corrected Typo (askeita)

This PR was submitted for the 5.3 branch but it was merged into the 4.4 branch instead.

Discussion
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Corrected Typo

Removed extra "s" in "fails"

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Commits
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20f057c Corrected Typo

Author: javiereguiluz

components/phpunit_bridge.rst

@@ -229,7 +229,7 @@ Making Tests Fail
 By default, any non-legacy-tagged or any non-`@-silenced <@-silencing operator>`_
 deprecation notices will make tests fail. Alternatively, you can configure
 an arbitrary threshold by setting ``SYMFONY_DEPRECATIONS_HELPER`` to
-``max[total]=320`` for instance. It will make the tests fails only if a
+``max[total]=320`` for instance. It will make the tests fail only if a
 higher number of deprecation notices is reached (``0`` is the default
 value).