Drop PHP 8.1 from CI

Author: matt-bernhardt

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php-version: ['8.1', '8.2', '8.3', '8.4']
+        php-version: ['8.2', '8.3', '8.4']
 
     steps:
     - uses: actions/checkout@v4