Do not run Pull Request unit tests on unsupported versions

4076393 dropped support for PHP
versions < 8.2

Author: cookieguru

.github/workflows/pr.yaml

@@ -9,11 +9,11 @@ jobs:
 
     strategy:
       matrix:
-        php: [ '7.2', '7.3', '7.4', '8', '8.1', '8.2', '8.3']
+        php: ['8.2', '8.3']
 
     steps:
       - name: "Init repository"
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: "Setup PHP"
         uses: shivammathur/setup-php@v2