[docs] Add missing word "any" in unittest -k cmdline option description (GH-29571)

diff --git a/Doc/library/unittest.rst b/Doc/library/unittest.rst
index a6f9046..bf7a1e8 100644
--- a/Doc/library/unittest.rst
+++ b/Doc/library/unittest.rst
@@ -227,7 +227,7 @@
 
    Only run test methods and classes that match the pattern or substring.
    This option may be used multiple times, in which case all test cases that
-   match of the given patterns are included.
+   match any of the given patterns are included.
 
    Patterns that contain a wildcard character (``*``) are matched against the
    test name using :meth:`fnmatch.fnmatchcase`; otherwise simple case-sensitive