Workflow: added missing repository checkout

Repository checkout was missing from the dispatch workflow

.github/workflows/dispatcher.yml

@@ -5,6 +5,9 @@ on:
     branches:
       - '**'   # minden branchre lefut
 
+permissions:
+  contents: write
+
 jobs:
   detect-and-dispatch:
     runs-on: self-hosted # (sajat rpi-on fusson)
@@ -26,6 +29,10 @@ jobs:
             echo "project=unknown" >> $GITHUB_OUTPUT
           fi
 
+
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
       - name: Trigger Engine tests
         if: steps.detect.outputs.project == 'Engine'
         uses: peter-evans/workflow-dispatch@v2