Fix set-output GHA deprecation warning in build-container.yml

Author: jeff-takaki

.github/workflows/build-container.yml

@@ -17,7 +17,7 @@ jobs:
     steps:
     - name: make date tag
       id: mkdatetag
-      run: echo "::set-output name=dtag::$(date +%Y%m%d-%H%M)"
+      run: echo "dtag=$(date +%Y%m%d-%H%M)" >> $GITHUB_OUTPUT
 
   build:
     runs-on: ubuntu-latest
@@ -42,7 +42,7 @@ jobs:
         # This causes the tag_list array to be comma-separated below,
         # which is required for build-push-action
         IFS=,
-        echo "::set-output name=taglist::${tag_list[*]}"
+        echo "taglist=${tag_list[*]}" >> $GITHUB_OUTPUT
 
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v1

.github/workflows/python-linters.yml

@@ -11,7 +11,7 @@ jobs:
     - uses: actions/checkout@v2
     - id: python-files
       run: |
-        echo “filelist=:$(find . -type f -exec awk ' /^#!.*python/{print FILENAME} {nextfile}' {} + | tr '\n' ' ')” >> $GITHUB_OUTPUT
+        echo "filelist=:$(find . -type f -exec awk ' /^#!.*python/{print FILENAME} {nextfile}' {} + | tr '\n' ' ')" >> $GITHUB_OUTPUT
 
   pylint:
     runs-on: ubuntu-20.04