chore(deps): update ghcr.io/zitadel/zitadel docker tag to v4.15.0 (#1623)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

kubernetes/apps/authentication/zitadel/app/helmrelease.yaml

@@ -18,7 +18,7 @@ spec:
   values:
     image:
       repository: ghcr.io/zitadel/zitadel
-      tag: v4.13.0@sha256:fbbe11f3ec190d7147e5e3d650f5d9aaeba822b1e6dcb63d9b946166c32b7c83
+      tag: v4.15.0@sha256:cc9fb3b2788dcbd0dff93781a0323bbe491a4cec11e1caefd9a1ed31f7fdc145
     setupJob:
       machinekeyWriter:
         image: