Fix broken release pipeline

Co-authored-by: Shwetha Gururaj <gururajsh@vmware.com>
Co-authored-by: Alex Rocha <alexr1@vmware.com>

.github/workflows/build-sign-upload.yml

@@ -157,7 +157,7 @@ jobs:
       with:
         repository: cloudfoundry/cli-ci.git
         path: cli-ci
-        ref: master
+        ref: main
 
     - name: Install Linux Packages
       run: sudo apt update && sudo apt install -y --no-install-recommends fakeroot
@@ -404,7 +404,7 @@ jobs:
       with:
         repository: cloudfoundry/cli-ci.git
         path: cli-ci
-        ref: master
+        ref: main
 
     - name: Checkout bomutils
       uses: actions/checkout@v2

README.md

@@ -1,4 +1,3 @@
 # Cloud Foundry CLI
 
-The READMEs for release branches have been consolidated into the [Master branch
-README](https://github.com/cloudfoundry/cli/blob/master/README.md).
+The READMEs for release branches have been consolidated into the [Master branch README](https://github.com/cloudfoundry/cli/blob/main/README.md).