Update build_arduino.yml

Author: chris1howell

.github/workflows/build_arduino.yml

@@ -70,7 +70,7 @@ jobs:
           source ci/info_common.sh info.json
 
       - name: Upload output to GitHub
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: ${{ matrix.name }}
           path: |