Fix missing closing curly bracket in docker.yml

Author: tillrohrmann

.github/workflows/docker.yml

@@ -41,7 +41,7 @@ jobs:
           tags: |
             type=ref,event=branch
             type=semver,pattern={{version}}
-            type=semver,pattern={{major}}.{{minor}
+            type=semver,pattern={{major}}.{{minor}}
 
       - name: Build docker image
         uses: docker/build-push-action@v3