Update generateCourseOverview.yml

Author: PeterReiter

.github/workflows/generateCourseOverview.yml

@@ -59,6 +59,12 @@ jobs:
           liaex -i index.yml -o index --format project --project-category-blur
           ls
           
+      - name: Cache repository
+        uses: actions/cache@v3
+        with:
+          path: repository
+          key: repository-${{ github.sha }}
+          
   commit:
     needs:
       [run_index]