Update (#2506)

Co-authored-by: Paul Craven <paul.craven@optimizely.com>

Author: pvcraven

.github/workflows/selfhosted_runner.yml

@@ -64,7 +64,7 @@ jobs:
       - name: Upload a Build Artifact
         if: always() && steps.prepare-artifact.outcome == 'success'
         continue-on-error: true
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: pull-request-payload
           path: pull_request_payload.json