Fix artifacts

.github/workflows/ci.yml

@@ -75,13 +75,9 @@ jobs:
     runs-on: ubuntu-latest
     needs: build
     steps:
-      - uses: actions/download-artifact@v2
-        with:
-          path: artifacts
-
-      - shell: bash
-        working-directory: artifacts
-        run: |
-          for i in $( ls ); do
-            cat $i/$ARTIFACT
-          done
+    - name: 'Upload Artifact'
+      uses: actions/upload-artifact@v4
+      with:
+        name: my-artifact
+        path: my_file.txt
+        retention-days: 5