Fix version number in use_load_tests deprecation reference (pythonGH-119151)

Deprecation took place in d78742a (3.5)

Author: jacobtylerwalls

Doc/whatsnew/3.12.rst

@@ -1739,7 +1739,7 @@ unittest
 
   * Undocumented :meth:`TestLoader.loadTestsFromModule
     <unittest.TestLoader.loadTestsFromModule>` parameter *use_load_tests*
-    (deprecated and ignored since Python 3.2).
+    (deprecated and ignored since Python 3.5).
 
   * An alias of the :class:`~unittest.TextTestResult` class:
     ``_TextTestResult`` (deprecated in Python 3.2).