chore: drop PHP 8.2 temporarily

Author: kenjis

.github/workflows/test-phpunit.yml

@@ -56,10 +56,6 @@ jobs:
           - '7.4'
           - '8.0'
           - '8.1'
-          - '8.2'
-        include:
-          - php-version: '8.2'
-            composer-option: '--ignore-platform-req=php'
 
     uses: ./.github/workflows/reusable-phpunit-test.yml # @TODO Extract to codeigniter4/.github repo
     with: