docs(readme): examples (#14)

* cleanup readme

* docs: readme example

* Example in readme

* docs: readme example

Author: oycyc

README.md

@@ -30,6 +30,8 @@ It's super easy to get started and use this GitHub Action to test your OPA Rego
 ```yaml
 - name: Run OPA Rego Tests
   uses: masterpointio/github-action-opa-rego-test@main
+  with:
+    report_untested_files: true # Flag to check & report Rego files that does NOT have corresponding test files. Optional, defaults to false.
 ```
 
 <details>
@@ -143,6 +145,8 @@ Contributions are welcome! Please feel free to submit a Pull Request or open any
 
 ## 💬 Example Pull Request Comments
 
+One of the testing steps is running the test workflow against this Action itself. You can see some live examples in the closed PR section, including this [example here](https://github.com/masterpointio/github-action-opa-rego-test/pull/9#issuecomment-2305253112).
+
 - ![Masterpoint GitHub Actions OPA Rego Test PR Example](./assets/readme-example-1.png)
   - Using `report_untested_files` to indicate policies without corresponding tests.
 - ![Masterpoint GitHub Actions OPA Rego Test PR Example](./assets/readme-example-2.png)