fix workflow

.gitea/workflows/build-terraform-shell.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Login to registry
         uses: docker/login-action@v3
         with:
-          registry: ${{ secrets.REGISTRY_URL }}
+          registry: ${{ vars.REGISTRY_URL }}
           username: ${{ secrets.REGISTRY_USER }}
           password: ${{ secrets.REGISTRY_PASSWORD }}
 
@@ -37,4 +37,4 @@ jobs:
           context: .
           file: ./tools/terraform-shell/Dockerfile
           push: true
-          tags: ${{ vars.CI_REGISTRY_IMAGE }}:terraform
+          tags: ${{ vars.REGISTRY_URL }}/${{ secrets.REGISTRY_USER }}/coder-base:terraform