Add note about dependabot

README.md

@@ -9,6 +9,16 @@
 
 GitHub Action for [UPX](https://github.com/upx/upx), the Ultimate Packer for eXecutables.
 
+___
+
+* [Usage](#usage)
+* [Customizing](#customizing)
+  * [inputs](#inputs)
+* [Keep up-to-date with GitHub Dependabot](#keep-up-to-date-with-github-dependabot)
+* [Limitation](#limitation)
+* [How can I help?](#how-can-i-help)
+* [License](#license)
+
 ## Usage
 
 ```yaml
@@ -46,11 +56,27 @@ Following inputs can be used as `step.with` keys
 | `file`        | String  |           | File to compress (**required**) |
 | `args`        | String  |           | Arguments to pass to UPX        |
 
+## Keep up-to-date with GitHub Dependabot
+
+Since [Dependabot](https://docs.github.com/en/github/administering-a-repository/keeping-your-actions-up-to-date-with-github-dependabot)
+has [native GitHub Actions support](https://docs.github.com/en/github/administering-a-repository/configuration-options-for-dependency-updates#package-ecosystem),
+to enable it on your GitHub repo all you need to do is add the `.github/dependabot.yml` file:
+
+```yaml
+version: 2
+updates:
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+```
+
 ## Limitation
 
 This action is only available for Linux and Windows [virtual environments](https://help.github.com/en/articles/virtual-environments-for-github-actions#supported-virtual-environments-and-hardware-resources).
 
-## How can I help ?
+## How can I help?
 
 All kinds of contributions are welcome :raised_hands:! The most basic way to show your support is to star :star2: the project, or to raise issues :speech_balloon: You can also support this project by [**becoming a sponsor on GitHub**](https://github.com/sponsors/crazy-max) :clap: or by making a [Paypal donation](https://www.paypal.me/crazyws) to ensure this journey continues indefinitely! :rocket: