Update intro paragraphs in the documentation (#2952) (#2954)

(cherry picked from commit 5b610f6)

Co-authored-by: Miguel Grinberg <[email protected]>

Author: github-actions[bot]

docs/reference/index.md

@@ -6,7 +6,7 @@ mapped_pages:
 
 # Python [overview]
 
-This is the official low-level Python client for {{es}}. Its goal is to provide common ground for all {{es}}-related code in Python. For this reason, the client is designed to be unopinionated and extendable. An API reference is available on [Read the Docs](https://elasticsearch-py.readthedocs.io).
+This is the official Python client for {{es}}. Its goal is to provide common ground for all {{es}}-related code in Python. For this reason, the client is designed to be unopinionated and extendable. API reference documentation for this client is available on [Read the Docs](https://elasticsearch-py.readthedocs.io).
 
 
 ## Example use [_example_use]

docs/sphinx/index.rst

@@ -1,6 +1,12 @@
 Python Elasticsearch Client
 ===========================
 
+Welcome to the API documentation of the official Python client for Elasticsearch!
+The goal of this client is to provide common ground for all Elasticsearch-related
+code in Python; because of this it tries to be opinion-free and very extendable.
+
+High-level documentation for this client is `also available <https://www.elastic.co/docs/reference/elasticsearch/clients/python>`_.
+
 .. toctree::
    :maxdepth: 2