actions: bump upload artifact versions (#1493)

Author: NARSimoes

.github/workflows/check-label.yml

@@ -15,7 +15,7 @@ jobs:
       run: |
         echo "$PR_NUMBER" > pr.txt
     - name: Save PR
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f  # v6.0.0
       with:
         name: pr.txt
         path: |