chore: redefine github actions.

Author: TiSiE

.github/workflows/check-pr.yml

@@ -1,10 +1,11 @@
-name: Check pull request
+name: Tests
 on:
   pull_request:
     branches:
       - '**.x'
 jobs:
   testing:
+    name: PHP ${{ matrix.php }}
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -14,7 +15,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Setup PHP with composer
-        uses: actions/setup-php@v2
+        uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php }}
           tools: composer