Update composer parameter

Author: odan

.github/workflows/build.yml

@@ -40,7 +40,7 @@ jobs:
 
       - name: Install dependencies for PHP 8
         if: matrix.php-versions >= '8.0'
-        run: composer update --prefer-dist --no-progress --ignore-platform-reqs
+        run: composer update --prefer-dist --no-progress --ignore-platform-req=php
 
       - name: Run test suite
         run: composer check