doc: add call for maintainers

Author: bobheadxi

README.md

@@ -3,6 +3,8 @@
 `bobheadxi/deployments` is a [GitHub Action](https://github.com/features/actions) for working painlessly with [GitHub deployment statuses](https://docs.github.com/en/rest/reference/deployments).
 Instead of exposing convoluted Action configuration that mirrors that of the [GitHub API](https://developer.github.com/v3/repos/deployments/) like some of the other available Actions do, this Action simply exposes a number of configurable, easy-to-use "steps" common to most deployment lifecycles.
 
+> 📢 This project is in need of additional maintainers - if you are interested in helping out please [let me know](https://github.com/bobheadxi/deployments/discussions/103)!
+
 - [Configuration](#configuration)
   - [`step: start`](#step-start)
   - [`step: finish`](#step-finish)