Update README

Author: chingc

README.md

@@ -209,7 +209,13 @@ See the workflows:
 
 <br/>When using the `workflow_dispatch` event, you can optionally specify inputs that are passed to the workflow.
 
-This trigger only receives events when the workflow file is on the default branch. This means you have to merge your changes to `main` or `master` before you can test your inputs. It would be wise to try input changes in a totally separate workflow before merging them into critical workflows.
+This trigger only receives events when the workflow file is on the default branch. This means you have to merge your changes to `main` or `master` before you can test your inputs.
+
+> [!TIP]
+> Try input changes in a totally separate workflow before merging them into critical workflows.
+
+> [!WARNING]
+> If the event that triggers the workflow isn't `workflow_dispatch` the input values are empty/null.
 
 See the [workflow](.github/workflows/workflow_input.yml).