fix image tag

Signed-off-by: Frank Jogeleit <[email protected]>

Author: fjogeleit

.github/workflows/image.yaml

@@ -47,7 +47,7 @@ jobs:
         run: |
           set -e
           TAG=${{ github.ref_name }}
-          echo "VERSION=${TAG#policy-reporter-ui-v}" >> $GITHUB_ENV
+          echo "VERSION=${TAG#v}" >> $GITHUB_ENV
 
       - name: Build frontend
         run: |