Add a small section on "PR comments on push" mode

README.md

@@ -203,7 +203,6 @@ jobs:
           GITHUB_TOKEN: ${{ github.token }}
 ```
 
-
 ### Merging multiple coverage reports
 
 In case you have a job matrix and you want the report to be on the global
@@ -351,6 +350,16 @@ jobs:
     VERBOSE: false
 ```
 
+### Commenting on the PR on the `push` event
+
+This action's PR comments with coverage reports is designed to work when
+running on the `pull_request` events. That being said, if your CI is running on
+feature branches on the `push` events and not on the `pull_request` events, we
+partly support a mode where the action can comment on the PR also when running
+on the `push` events. This is most likely only useful for setups not accepting
+external PRs and you will not have the best user experience.
+If that's something you need to do, please have a look at [this issue](https://github.com/py-cov-action/python-coverage-comment-action/issues/234).
+
 ## Overriding the template
 
 By default, comments are generated from a