Merge pull request matplotlib#28184 from meeseeksmachine/auto-backport-of-pr-28182-on-v3.9.x

Backport PR matplotlib#28182 on branch v3.9.x (Bump custom hatch deprecation expiration)

Author: QuLogic

lib/matplotlib/hatch.py

@@ -188,7 +188,7 @@ def _validate_hatch_pattern(hatch):
             invalids = ''.join(sorted(invalids))
             _api.warn_deprecated(
                 '3.4',
-                removal='3.9',  # one release after custom hatches (#20690)
+                removal='3.11',  # one release after custom hatches (#20690)
                 message=f'hatch must consist of a string of "{valid}" or '
                         'None, but found the following invalid values '
                         f'"{invalids}". Passing invalid values is deprecated '