Bump PHP to 8.3

Author: cleptric

.github/workflows/cs.yaml

@@ -21,7 +21,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: '8.2'
+          php-version: '8.3'
 
       - name: Install dependencies
         run: composer update --no-progress --no-interaction --prefer-dist
@@ -39,7 +39,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: '8.2'
+          php-version: '8.3'
 
       - name: Install dependencies
         run: composer update --no-progress --no-interaction --prefer-dist