ci: make R2 upload step optional to allow GitHub release upload

Adds continue-on-error to R2 upload step so that the workflow
can proceed to upload binaries to GitHub releases even when
R2 credentials are not available.

Author: hanzo-dev

.github/workflows/build-binaries.yml

@@ -60,6 +60,7 @@ jobs:
           cp ${{ env.ZIP_FILE_NAME}} latest.zip
 
       - name: Upload bundle to R2 bucket
+        continue-on-error: true
         uses: shallwefootball/s3-upload-action@master
         with:
           endpoint: https://54bf1bf573b3e6471e574cc4d318db64.r2.cloudflarestorage.com