[3.12] Add missing fullstop . to whatsnew/3.8.rst (pythonGH-126553) (python#126673)

Add missing fullstop `.` to whatsnew/3.8.rst (pythonGH-126553)
(cherry picked from commit 82269c7)

Co-authored-by: Rafael Fontenelle <[email protected]>

Author: miss-islington

Doc/whatsnew/3.8.rst

@@ -936,7 +936,7 @@ Add option ``--json-lines`` to parse every input line as a separate JSON object.
 logging
 -------
 
-Added a *force* keyword argument to :func:`logging.basicConfig`
+Added a *force* keyword argument to :func:`logging.basicConfig`.
 When set to true, any existing handlers attached
 to the root logger are removed and closed before carrying out the
 configuration specified by the other arguments.