Update service-docker-repository-query image to version 21

Linked build commit: ba24478aa5

service-docker-repository-query/deployment.yaml

@@ -50,7 +50,7 @@ spec:
               mountPath: /etc/secrets
       containers:
         - name: service-docker-repository-query
-          image: ghcr.io/gansejunge/app-notifications-service-docker-repository-query:20
+          image: ghcr.io/gansejunge/app-notifications-service-docker-repository-query:21
           ports:
             - containerPort: 5000
               name: fastapi