patch: Set environment variables step

Author: marcusholmgren

.github/workflows/main.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout master
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2.3.4
       - name: Log in to GitHub Packages
         run: echo ${GITHUB_TOKEN} | docker login -u ${GITHUB_ACTOR} --password-stdin docker.pkg.github.com
         env:
@@ -45,7 +45,7 @@ jobs:
     needs: build
     steps:
       - name: Checkout master
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2.3.4
       - name: Log in to GitHub Packages
         run: echo ${GITHUB_TOKEN} | docker login -u ${GITHUB_ACTOR} --password-stdin docker.pkg.github.com
         env:
@@ -97,7 +97,7 @@ jobs:
       HEROKU_REGISTRY_IMAGE: registry.heroku.com/${HEROKU_APP_NAME}/foo
     steps:
       - name: Checkout master
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2.3.4
       - name: Log in to GitHub Packages
         run: echo ${GITHUB_TOKEN} | docker login -u ${GITHUB_ACTOR} --password-stdin docker.pkg.github.com
         env:
@@ -128,8 +128,8 @@ jobs:
         run: docker push ${{ env.HEROKU_REGISTRY_IMAGE }}:latest
       - name: Set environment variables
         run: |
-          echo ::set-env name=HEROKU_REGISTRY_IMAGE::${{ env.HEROKU_REGISTRY_IMAGE }}
-          echo ::set-env name=HEROKU_AUTH_TOKEN::${{ secrets.HEROKU_AUTH_TOKEN }}
+          echo "HEROKU_REGISTRY_IMAGE=${{ env.HEROKU_REGISTRY_IMAGE }}" >> $GITHUB_ENV
+          echo "HEROKU_AUTH_TOKEN=${{ secrets.HEROKU_AUTH_TOKEN }}" >> $GITHUB_ENV
       - name: Release
         run: |
           chmod +x ./release.sh