Update prepare-release-branch.yml

Author: emdneto

.github/workflows/prepare-release-branch.yml

@@ -16,11 +16,6 @@ jobs:
         env:
           PRERELEASE_VERSION: ${{ github.event.inputs.prerelease_version }}
         run: |
-          if [[ $GITHUB_REF_NAME != main ]]; then
-            echo this workflow should only be run against main
-            exit 1
-          fi
-
           if ! grep --quiet "^## Unreleased$" CHANGELOG.md; then
             echo the change log is missing an \"Unreleased\" section
             exit 1