Limit to PHP 8.3 on Ubuntu for GitHub Action

Author: nasrulhazim

.github/workflows/run-tests.yml

@@ -16,8 +16,8 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        os: [ubuntu-latest, windows-latest]
-        php: [8.3, 8.2, 8.1]
+        os: [ubuntu-latest]
+        php: [8.3]
         stability: [prefer-lowest, prefer-stable]
 
     name: P${{ matrix.php }} - ${{ matrix.stability }} - ${{ matrix.os }}