added download artifact process

.github/workflows/ci.yml

@@ -36,6 +36,16 @@ jobs:
     runs-on: ubuntu-latest
     needs: Build  # run after Build job
     steps:
+      - uses: actions/checkout@v3
+
+      - name: Download Build Directory
+        uses: actions/download-artifact@v3
+        with:
+          name: build  
+  
+      - name: List Build Files
+        run: ls -R build  
+
       - name: test
         run: |
           cd build