chore(deps): update helm release oauth2-proxy to v7.12.6

Author: renovate[bot]

playgrounds/capsule/assets/distro/dashboard.flux.yaml

@@ -13,7 +13,7 @@ spec:
   chart:
     spec:
       chart: oauth2-proxy
-      version: "7.12.1"
+      version: "7.12.6"
       sourceRef:
         kind: HelmRepository
         name: oauth2-proxy