Fixing Unit tests requirements.

Author: tiagosampaio

.github/workflows/php-unit.yml

@@ -24,7 +24,7 @@ jobs:
         env:
           MAGENTO_VERSION: '2.4.4-p9'
 
-      - uses: extdn/github-actions-m2/magento-unit-tests/7.4@master
+      - uses: extdn/github-actions-m2/magento-unit-tests/8.1@master
         env:
           MAGENTO_VERSION: '2.4.5-p8'