Update release.yml

Use password-stdin

Author: seanpmorgan

.github/workflows/release.yml

@@ -105,6 +105,6 @@ jobs:
       - uses: actions/checkout@v2
       - run: |
           set -e -x
-          docker login --username ${{ secrets.DOCKER_USER }} --password ${{ secrets.DOCKER_PW }}
+          echo ${{ secrets.DOCKER_PW }} | docker login --username ${{ secrets.DOCKER_USER }} --password-stdin
           bash .github/workflows/github_build_dev_container.sh
           docker push tfaddons/dev_container:latest-cpu