Update redis Docker tag to v20.6.1 (#88)

Co-authored-by: Renovate Bot <renovate-bot@gdata.de>

Author: ata-no-one

charts/vaas/Chart.yaml

@@ -8,7 +8,7 @@ maintainers:
 type: application
 dependencies:
   - name: redis
-    version: 20.4.0
+    version: 20.6.1
     condition: redis.enabled
     repository: oci://registry-1.docker.io/bitnamicharts
   - name: mini-identity-provider