chore: Add GitHub Marketplace branding (#473)

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**Description:**

Adds GitHub Marketplace branding.

**Related Issues:**

Fixes #472

**Checklist:**

- [x] Review the [CONTRIBUTING.md](../blob/main/CONTRIBUTING.md)
documentation.
- [x] Add a reference to a related issue in the repository.
- [x] Add a description of the changes proposed in the pull request.
- [x] Add unit tests if applicable.
- [x] Update documentation if applicable.
- [x] Add a note in the [CHANGELOG.md](../blob/main/CHANGELOG.md) if
applicable.
- [x] Sign the [Google
CLA](https://cla.developers.google.com/about/google-corporate).

Signed-off-by: Ian Lewis <[email protected]>

Author: Ian Lewis

action.yml

@@ -14,6 +14,9 @@
 
 name: "TODO Issue Reopener"
 description: "Reopen issues that are referenced by TODOs"
+branding:
+  icon: "refresh-ccw"
+  color: "green"
 inputs:
   config-path:
     description: "The path to the config file."