ensure that the branch gets used in the publish step

scripts/binary/trigger-publish-binary-pipeline.js

@@ -9,14 +9,16 @@ const { getNextVersionForBinary } = require('../get-next-version')
 
   const { nextVersion } = await getNextVersionForBinary()
 
+  // This is the payload that will be sent to the cypress-publish-binary project.
+  // The API is defined here: https://circleci.com/docs/api/v2/index.html#operation/triggerPipeline
   const body = JSON.stringify({
+    branch: 'upgrade-electron-29',
     parameters: {
       temp_dir: os.tmpdir(),
       sha: process.env.CIRCLE_SHA1,
       job_name: process.env.CIRCLE_JOB,
       triggered_workflow_id: process.env.CIRCLE_WORKFLOW_ID,
       triggered_job_url: process.env.CIRCLE_BUILD_URL,
-      branch: 'upgrade-electron-29',
       should_persist_artifacts: Boolean(process.env.SHOULD_PERSIST_ARTIFACTS),
       binary_version: nextVersion,
     },