minor symfony#18705 [Testing] Fix Crawler assertSelectorTextSame documentation (alamirault)

This PR was merged into the 6.3 branch.

Discussion
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[Testing] Fix Crawler assertSelectorTextSame documentation

Method `assertSelectorTextNotSame` does not exist, so we must not add this text

(Found when working on symfony#18704)

Commits
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70499a8 Fix Crawler assertSelectorTextSame documentation

Author: javiereguiluz

testing.rst

@@ -984,7 +984,7 @@ Crawler Assertions
     contain the expected text.
 ``assertSelectorTextSame(string $selector, string $text, string $message = '')``
     Asserts that the contents of the first element matching the given
-    selector does (not) equal the expected text.
+    selector does equal the expected text.
 ``assertPageTitleSame(string $expectedTitle, string $message = '')``
     Asserts that the ``<title>`` element is equal to the given title.
 ``assertPageTitleContains(string $expectedTitle, string $message = '')``