fix readme note formatting

Author: miguelgrinberg

README

@@ -1,12 +1,13 @@
 Elasticsearch DSL
 =================
 
-> [!NOTE]
-> As of release 9.0, Elasticsearch DSL is part of the official Elasticsearch
-> client for Python, so a separate install is not needed. To migrate, just
-> replace `elasticsearch_dsl` with `elasticsearch.dsl` in all imports.
->
-> The following instructions apply to versions 8 and older.
+.. note::
+   As of release 8.18.0, Elasticsearch DSL package is part of the official
+   Elasticsearch client for Python, so a separate install is not needed. To
+   migrate, just replace `elasticsearch_dsl` with `elasticsearch.dsl` in all
+   imports.
+
+   The following instructions apply to versions 8.17 and older.
 
 Elasticsearch DSL is a high-level library whose aim is to help with writing and
 running queries against Elasticsearch. It is built on top of the official