chore(deps): update container image dpage/pgadmin4 to v8.1@7938869 (#16077)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| dpage/pgadmin4 | minor | `8.0` -> `8.1` |

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charts/stable/pgadmin/values.yaml

@@ -1,7 +1,7 @@
 image:
   repository: dpage/pgadmin4
   pullPolicy: IfNotPresent
-  tag: 8.0@sha256:2f162ef35d3afca1396c4222a0403eb861b9800039bcf368074fd19ff02b8cd8
+  tag: 8.1@sha256:79388691706e7b4c3f1e4d567a594ade467d4cab4ecf1a97aaa0beb5b19b5b53
 service:
   main:
     ports: