Fix single quote in stage

Author: myoung34

.github/workflows/release.yml

@@ -67,7 +67,7 @@ jobs:
     - name: Available platforms
       run: echo ${{ steps.buildx.outputs.platforms }}
     - name: Copy Dockerfile
-      run: cp Dockerfile Dockerfile.ubuntu-xenial; sed -i.bak 's/FROM.*/FROM ${ORG}\/github-runner-base:ubuntu-xenial/' Dockerfile.ubuntu-xenial
+      run: cp Dockerfile Dockerfile.ubuntu-xenial; sed -i.bak "s/FROM.*/FROM ${ORG}\/github-runner-base:ubuntu-xenial/" Dockerfile.ubuntu-xenial
     - name: Login
       run: docker login -u ${{ secrets.DOCKER_USER }} -p ${{ secrets.DOCKER_TOKEN }}
     - name: Build