chore(deps): update helm release cloudnative-pg to v0.26.0

Author: renovate[bot]

applications/cloudnativepg.yaml

@@ -9,5 +9,5 @@ spec:
     server: "https://kubernetes.default.svc"
   source:
     repoURL: "https://cloudnative-pg.github.io/charts"
-    targetRevision: 0.24.0
+    targetRevision: 0.26.0
     chart: cloudnative-pg