Combine jobs and only deploy if branch is master.

Author: kgodey

.github/workflows/lektor-build-deploy.yml

@@ -14,10 +14,7 @@ jobs:
       pip install pipenv
       pipenv install
       pipenv run lektor build -f webpack
- deploy:
-  runs-on: ubuntu-latest
-  needs: build
-  steps:
-   - name: Deploy to https://github.com/creativecommons/creativecommons.github.io
+   - name: Deploy to production
+     if: ${{ github.ref == "master" }}
      run: |
       pipenv run lektor deploy ghpages --username ${{ secrets.LEKTOR_DEPLOY_USERNAME }} --password ${{ secrets.LEKTOR_DEPLOY_PASSWORD }}