add contributing section to README

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

README.md

@@ -26,7 +26,7 @@ ___
   * [DigitalOcean](#digitalocean-container-registry)
 * [Customizing](#customizing)
   * [inputs](#inputs)
-* [Keep up-to-date with GitHub Dependabot](#keep-up-to-date-with-github-dependabot)
+* [Contributing](#contributing)
 
 ## Usage
 
@@ -509,18 +509,7 @@ The following inputs can be used as `step.with` keys:
 | `ecr`      | String | `auto`  | Specifies whether the given registry is ECR (`auto`, `true` or `false`)       |
 | `logout`   | Bool   | `true`  | Log out from the Docker registry at the end of a job                          |
 
-## Keep up-to-date with GitHub Dependabot
+## Contributing
 
-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"
-```
+Want to contribute? Awesome! You can find information about contributing to
+this project in the [CONTRIBUTING.md](/.github/CONTRIBUTING.md)