update docker tag

Author: v-morlock

.github/workflows/testing.yaml

@@ -73,7 +73,7 @@ jobs:
         with:
           cache-from: type=gha
           cache-to: type=gha,mode=max
-          tags: ghcr.io/it-rex-platform/frontend:latest
+          tags: ghcr.io/meitrex/frontend:latest
           push: true
 
   docker-build-keycloak-theme: