Bring 9.0.1 release to parent (elastic#2947)

Author: pquentin

docs/release-notes/index.md

@@ -12,13 +12,22 @@ To check for security updates, go to [Security announcements for the Elastic sta
 
 % Release notes include only features, enhancements, and fixes. Add breaking changes, deprecations, and known issues to the applicable release notes sections.
 
-% ## version.next [felasticsearch-python-client-next-release-notes]
+% ## version.next [elasticsearch-python-client-next-release-notes]
 
 % ### Features and enhancements [elasticsearch-python-client-next-features-enhancements]
 % *
 
 % ### Fixes [elasticsearch-python-client-next-fixes]
 
+## 9.0.1 (2025-04-28) [elasticsearch-python-client-901-release-notes]
+
+### Features and enhancements [elasticsearch-python-client-901-features-enhancements]
+
+* Surface caused_by in ApiError ([#2932](https://github.com/elastic/elasticsearch-py/pull/2932))
+* Clarify Elasticsearch 9.x compatibility ([#2928](https://github.com/elastic/elasticsearch-py/pull/2928))
+* Reorganize Sphinx docs to only include reference pages ([#2776](https://github.com/elastic/elasticsearch-py/pull/2776))
+
+
 ## 9.0.0 (2025-04-15) [elasticsearch-python-client-900-release-notes]
 
 :::{tip}

elasticsearch/_version.py

@@ -15,4 +15,4 @@
 #  specific language governing permissions and limitations
 #  under the License.
 
-__versionstr__ = "9.0.0"
+__versionstr__ = "9.0.1"