tower 0.60.3 — register POST /api/tenants/{id}/settings/s3-buckets/provision

Backend rebuild for the route I added in 0.60.2 + ui:0.61.2 cycle —
forgot to rebuild Go binary alongside the chart bump. 0.60.2 binary
didn't carry the handler, hence the 404 on Provision now click.

values.yaml

@@ -9,7 +9,7 @@ backend:
     # so every cluster that runs Tower needs the same imagePullSecret
     # provisioned out-of-band (until cluster-platform-v3 owns it).
     repository: registry.odoosky.cloud/odoosky/docker-mirror/tower
-    tag: "0.60.2"
+    tag: "0.60.3"
     pullPolicy: IfNotPresent
   imagePullSecrets:
     - name: docker-mirror-pull