Update splunk/splunk Docker tag to v9.2.0

splunk/deployment.yaml

@@ -17,7 +17,7 @@ spec:
         app: splunk
     spec:
       containers:
-      - image: splunk/splunk:9.0.4@sha256:393160e2cc34eaf8ba2de279211ebd9c7a32b8d9fdbc81680988aa7aef35ef41
+      - image: splunk/splunk:9.2.0@sha256:10307257ce43f3d026d766b4be922172c059dd2950afcedd6fae66b859944cec
         name: splunk
         env:
         - name: SPLUNK_START_ARGS