Update docs about ai-models-aurora

docs/ai_models_plugin.md

@@ -1,18 +1,21 @@
 # Plugin for ECMWF's `ai-models`
 
+```{warning}
+The plugin was intended to be released on PyPI under the name `ai-models-aurora`.
+Unfortunately, this name has been registered by a third party.
+Therefore, do _not_ install the plugin from the PyPI package name `ai-model-aurora`, but instead
+keep a close eye on the
+[the homepage of the plugin](https://github.com/ecmwf-lab/ai-models-aurora).
+```
+
 Aurora is a supported model for ECMWF's
 [`ai-models`](https://github.com/ecmwf-lab/ai-models)
-through the plugin
-[`ai-models-aurora`](https://github.com/ecmwf-lab/ai-models-aurora).
-Install this plugin with `pip`:
-
-```bash
-pip install ai-models-aurora
-```
+through
+[a plugin](https://github.com/ecmwf-lab/ai-models-aurora).
 
 See
 [the documentation of `ai-models`](https://github.com/ecmwf-lab/ai-models)
 for more information about `ai-models`
 and see
-[the documentation of `ai-models-aurora`](https://github.com/ecmwf-lab/ai-models-aurora)
+[the documentation of the plugin](https://github.com/ecmwf-lab/ai-models-aurora)
 for more information about the Aurora plugin.