Use GitHelper.current_git_branch in ios finalize prechecks

Author: oguzkocer

lib/fastlane/plugin/wpmreleasetoolkit/actions/ios/ios_finalize_prechecks.rb

@@ -8,7 +8,7 @@ def self.run(params)
         require_relative '../../helper/ios/ios_git_helper'
         require_relative '../../helper/git_helper'
 
-        current_branch = Fastlane::Actions.git_branch_name_using_HEAD
+        current_branch = Fastlane::Helper::GitHelper.current_git_branch
         UI.user_error!("Current branch - '#{current_branch}' - is not a release branch. Abort.") unless current_branch.start_with?('release/')
 
         version = Fastlane::Helper::Ios::VersionHelper.get_public_version