Adjust the Trivy scanning workflow to upload artifacts (kubeflow#2860)

* add step Upload trivy scanned_results to trivy.yaml

Signed-off-by: hansinikarunarathne <hansini.20@cse.mrt.ac.lk>

* fix linting issues

Signed-off-by: hansinikarunarathne <hansini.20@cse.mrt.ac.lk>

---------

Signed-off-by: hansinikarunarathne <hansini.20@cse.mrt.ac.lk>
Signed-off-by: Patrick Schönthaler <patrick.schoenthaler@itsc.de>

.github/workflows/trivy.yaml

@@ -41,8 +41,8 @@ jobs:
         cd hack
         python3 trivy_scan.py
 
-    # - name: Upload trivy scanned_results
-    #   uses: actions/upload-artifact@v4
-    #   with:
-    #     name: trivy_scanned_results
-    #     path: image_lists/
+    - name: Upload trivy scanned_results
+      uses: actions/upload-artifact@v4
+      with:
+        name: trivy_scanned_results
+        path: image_lists/