Add to main README

Author: dkfellows

README.md

@@ -13,6 +13,8 @@ These are intended for use in many types of project, wherever relevant.
 
 * [`download`](download) does cached downloads of files from the web.
 
+* [`git-push-changes-to-branch`](git-push-changes-to-branch) handles pushing updates generated by a workflow to a new branch.
+
 * [`instantiate-file`](instantiate-file) creates a file with a value provided by your workflow.
 
 * ['add_prs_to_project (reusable workflow)](.github/workflows/add_prs_to_project.yml) is a reusable workflow that you can use in your repository to add any PRs assigned to a user to a Project and set the Status in the project to a value of your choosing.