Fix branch name

.github/workflows/demo.yml

@@ -3,26 +3,26 @@ name: Deploy to Heroku
 on:
   push:
     branches:
-      - master
+      - main
 
 jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-node@v2
-      with:
-        node-version: '16'
-    - name: Install and Build
-      env:
-        API_URL: https://grampsjs-demo.herokuapp.com
-      run: |
-        npm install
-        npm run build
-    - uses: akhileshns/heroku-deploy@v3.8.8
-      with:
-        heroku_api_key: ${{secrets.HEROKU_API_KEY}}
-        heroku_app_name: grampsjs-demo
-        heroku_email: ${{secrets.HEROKU_EMAIL}}
-        usedocker: true
-        appdir: demo
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: "16"
+      - name: Install and Build
+        env:
+          API_URL: https://grampsjs-demo.herokuapp.com
+        run: |
+          npm install
+          npm run build
+      - uses: akhileshns/heroku-deploy@v3.8.8
+        with:
+          heroku_api_key: ${{secrets.HEROKU_API_KEY}}
+          heroku_app_name: grampsjs-demo
+          heroku_email: ${{secrets.HEROKU_EMAIL}}
+          usedocker: true
+          appdir: demo