Update README.md to reflect #3

README.md

@@ -17,13 +17,13 @@ Then, to submit your file for inclusion in this repository:
 3. Submit a **pull request** from your fork to this repository.
 
 ### Note on formats.json
-The `update_list.py` script updates the formats.json file. At some point, it should be run, and the result committed to the repository to update the list that Debatekeeper first downloads. If you can run this script as part of your PR, that's great, but don't worry about it—I can do it easily after merging your PR. Currently, until the new Debatekeeper release finishes beta testing, formats.json includes a couple of "bad" entries to allow testing of error conditions in the app, so to include those:
+A GitHub Action automatically runs after every commit to update the formats.json file (thanks to [Frank Richter](https://github.com/res2k) in [#3](https://github.com/czlee/debatekeeper-formats/pull/3)!), so you shouldn't need to do this. However, you can run the `update_list.py` script locally to see what it'll do if you like.
+
+Currently, until the Debatekeeper version 1.3 finishes beta testing, formats.json includes a couple of "bad" entries to allow testing of error conditions in the app, so to include those:
 ```
 python update_list.py --add-errors
 ```
 
-(In an ideal world, formats.json would be generated by the site build, but as far as I'm aware, custom plugins [can't be used with GitHub Pages](https://jekyllrb.com/docs/plugins/installation/).)
-
 How this is hosted
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