feat(unit-test)!: set default unit-test php version to 8.4

.github/workflows/_internal-unit.yaml

@@ -23,11 +23,12 @@ jobs:
     strategy:
       matrix:
         php_version:
-          - 7.4
-          - 8.1
+          - 8.2
+          - 8.3
+          - 8.4
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - uses: ./unit-test
       with:
         source_folder: _test/demo-package

unit-test/action.yml

@@ -4,7 +4,7 @@ description: "A Github Action that runs the Unit Tests of a Magento Package"
 inputs:
   php_version: 
     required: true
-    default: "8.1"
+    default: "8.4"
     description: "PHP Version to use"
 
   source_folder: