Fix typo in logging doc: picked -> pickled (GH-5942)

(cherry picked from commit 982c7233)
Co-authored-by: James Walker <19191463+jdswalker@users.noreply.github.com>

Doc/library/logging.rst

@@ -328,7 +328,7 @@ is the module's name in the Python package namespace.
       .. versionadded:: 3.2
 
    .. versionchanged:: 3.7
-      Loggers can now be picked and unpickled.
+      Loggers can now be pickled and unpickled.
 
 .. _levels: