Add the development status to the readme.

Author: chrisgavin

README.md

@@ -3,6 +3,8 @@
 
 A tool for syncing the [CodeQL Action](https://github.com/github/codeql-action/) from GitHub.com to GitHub Enterprise Server, including copying the CodeQL bundle. This allows the CodeQL Action to work even if your GitHub Enterprise Server or GitHub Actions runners do not have internet access.
 
+**Development Status:** Ready for Production Use
+
 ## Installation
 The CodeQL Action sync tool can be downloaded from the [releases page](https://github.com/github/codeql-action-sync-tool/releases/latest/) of this repository.