tests: lowest PHP 8.1 does not fail

Author: williamdes

.github/workflows/tests.yml

@@ -61,7 +61,7 @@ jobs:
                 composer-options: ['']
                 include:
                     # --prefer-lowest outputs have different error counts in the assertions
-                    - { php-version: '8.1', experimental: true, os: ubuntu-latest, composer-options: '--prefer-lowest' }
+                    - { php-version: '8.1', experimental: false, os: ubuntu-latest, composer-options: '--prefer-lowest' }
                     - { php-version: '8.2', experimental: true, os: ubuntu-latest, composer-options: '--prefer-lowest' }
                     - { php-version: '8.3', experimental: true, os: ubuntu-latest, composer-options: '--prefer-lowest' }
                     - { php-version: '8.4', experimental: true, os: ubuntu-latest, composer-options: '--prefer-lowest' }