chore(deps): update container image splunk/splunk to 9.2.2@c7208b6 by renovate (#24363)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| splunk/splunk | digest | `7109dc4` -> `c7208b6` |

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This PR has been generated by [Renovate
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charts/stable/splunk/Chart.yaml

@@ -34,4 +34,4 @@ sources:
   - https://hub.docker.com/r/splunk/splunk
   - https://splunk.github.io/docker-splunk
 type: application
-version: 9.1.5
+version: 9.1.6

charts/stable/splunk/values.yaml

@@ -1,7 +1,7 @@
 image:
   pullPolicy: IfNotPresent
   repository: splunk/splunk
-  tag: 9.2.2@sha256:7109dc42565ad45b207483a6124802e2dff4c07a7c2a187cce6f0e9692fb8ff4
+  tag: 9.2.2@sha256:c7208b641cdc2042d8355b754cd7f9a7a3b9feb0ffefecdb2714c816e7d33cfc
 
 securityContext:
   container: