Update Github Actions environment to Build for secrets.

Author: nubs

.github/workflows/php.yml

@@ -8,6 +8,7 @@ jobs:
             matrix:
                 php: ['5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0']
         name: PHP ${{ matrix.php }}
+        environment: Build
         steps:
             - uses: actions/checkout@v1
             - name: Install PHP