[DPE-6651] Update rock tag for new builds with updated percona packages (#399)

## Issue
We have new rock builds that include new versions of percona packages

## Solution
Update rock image

Author: shayancanonical

metadata.yaml

@@ -57,6 +57,6 @@ resources:
   mysql-router-image:
     type: oci-image
     description: OCI image for mysql-router
-    upstream-source: ghcr.io/canonical/charmed-mysql@sha256:5d2dcca486b8710720590c57bf97cc49ab79b1a739d6f482310c9aa962a14455
+    upstream-source: ghcr.io/canonical/charmed-mysql@sha256:089fc04dd2d6f1559161ddf4720c1e06559aeb731ecae57b050c9c816e9833e9
 assumes:
   - k8s-api