Bump to PHP 8.3

Author: cuppett

Diff for: .github/workflows/ci.yml

@@ -21,18 +21,18 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: ['8.1', '8.2']
+        php: ['8.2', '8.3']
         kubernetes: ['1.27.11', '1.28.7', '1.29.2']
-        laravel: ['9.*', '10.*', '11.*']
+        laravel: ['10.*', '11.*']
         prefer: [prefer-lowest, prefer-stable]
         include:
           - laravel: "10.*"
             testbench: "8.*"
           - laravel: "11.*"
             testbench: "9.*"
         exclude:
-          - laravel: "11.*"
-            php: "8.1"
+          - laravel: "10.*"
+            php: "8.3"
 
     name: PHP ${{ matrix.php }} - Laravel ${{ matrix.laravel }} - K8s v${{ matrix.kubernetes }} --${{ matrix.prefer }}