[PR #11485/cb91ff42 backport][stable-12] Fix: avoid deprecated callback. (#11531)

Fix: avoid deprecated callback. (#11485)

* Fix: avoid deprecated callback.

* addition of changelog

* Improve changelog fragment.

---------



(cherry picked from commit cb91ff424f)

Co-authored-by: Tom Uijldert <155556120+TomUijldert@users.noreply.github.com>
Co-authored-by: tom uijldert <tom.uijldert@gmail.com>
Co-authored-by: Felix Fontein <felix@fontein.de>

changelogs/fragments/11485-avoid-deprected-callback.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - splunk callback plugin - replace deprecated callback function (https://github.com/ansible-collections/community.general/pull/11485).

plugins/callback/splunk.py

@@ -254,7 +254,7 @@ class CallbackModule(CallbackBase):
             self._runtime(result),
         )
 
-    def runner_on_async_failed(self, result, **kwargs):
+    def v2_runner_on_async_failed(self, result, **kwargs):
         self.splunk.send_event(
             self.url,
             self.authtoken,