[3.11] gh-109451: Fix wrong format specifier in logging documentation (GH-109465) (GH-109482)

(cherry picked from commit 929cc4e)

Author: miss-islington

Doc/library/logging.rst

@@ -890,7 +890,7 @@ you want to use.
 
 In the case of {}-formatting, you can specify formatting flags by placing them
 after the attribute name, separated from it with a colon. For example: a
-placeholder of ``{msecs:03d}`` would format a millisecond value of ``4`` as
+placeholder of ``{msecs:03.0f}`` would format a millisecond value of ``4`` as
 ``004``. Refer to the :meth:`str.format` documentation for full details on
 the options available to you.