Update initial action message

Co-authored-by: Olivier Halligon <olivier.halligon@automattic.com>

Author: iangmaia

lib/fastlane/plugin/wpmreleasetoolkit/actions/common/buildkite_upload_pipeline_action.rb

@@ -14,7 +14,7 @@ def self.run(params)
         UI.user_error!('You should not provide both `branch` and `commit`') if !branch.nil? && commit != DEFAULT_COMMIT
         UI.user_error!('This action can only be called from a Buildkite CI build') unless ENV['BUILDKITE'] == 'true'
 
-        UI.message "Uploading pipeline on #{pipeline_file}, #{"branch #{branch}, " if branch}commit #{commit}"
+        UI.message "Adding steps from `#{pipeline_file}` to the current build (#{"branch: `#{branch}`, " if branch}commit: `#{commit}`)"
 
         env_vars = {
           'BUILDKITE_BRANCH' => branch,