Update upload-artifact to v2

Author: sabas1080

.github/workflows/compile-examples.yml

@@ -68,7 +68,7 @@ jobs:
 
       - name: Save memory usage change report as artifact
         if: github.event_name == 'pull_request'
-        uses: actions/upload-artifact@v1
+        uses: actions/upload-artifact@v2
         with:
           name: size-deltas-reports
           path: size-deltas-reports