[CI] Use v4 artifact download

.github/workflows/main.yml

@@ -223,7 +223,7 @@ jobs:
           git config --global user.email "${{ github.actor }}@users.noreply.github.com"
       
       - name: Download size artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           path: aggregated-sizes