remove php 8.1 and 8.2 from php-version matrix for GitHub workflow tests.yaml

Author: pavog

.github/workflows/tests.yaml

@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        php-version: [ '8.1', '8.2', '8.3', '8.4' ]
+        php-version: [ '8.3', '8.4' ]
 
     name: Run tests on PHP v${{ matrix.php-version }}