Add feedback request to README (#194)

Author: pquentin

README.md

@@ -36,6 +36,17 @@ If you'd like to make a contribution to `enterprise-search-python` we
 provide [contributing documentation](https://github.com/elastic/enterprise-search-python/tree/main/CONTRIBUTING.md)
 to ensure your first contribution goes smoothly.
 
+## Feedback 🗣️
+
+The engineering team here at Elastic is looking for developers to participate in
+research and feedback sessions to learn more about how you use our Python client and
+what improvements we can make to their design and your workflow. If you're interested in
+sharing your insights into developer experience and language client design, please fill
+out this [short form](https://forms.gle/bYZwDQXijfhfwshn9). Depending on the number of
+responses we get, we may either contact you for a 1:1 conversation or a focus group with
+other developers who use the same client. Thank you in advance - your feedback is
+crucial to improving the user experience for all Elasticsearch developers!
+
 ## License
 
 `enterprise-search-python` is available under the Apache-2.0 license.