Downgrade Infection version to 0.32.6

Newer versions requires PHP >= 8.3.

Signed-off-by: Maurício Meneghini Fauth <mauricio@mfauth.com.br>

Author: MauricioFauth

.github/workflows/mutation-tests.yml

@@ -36,7 +36,7 @@ jobs:
           php-version: ${{ matrix.php-version }}
           coverage: pcov
           ini-values: memory_limit=-1
-          tools: infection
+          tools: infection:0.32.6
 
       - name: Install Composer dependencies
         uses: ramsey/composer-install@v4