Update required python version (#7233)

The requirements.txt file includes Ansible 10.4 which only works with Python 3.11 or higher, so this PR updates the required python version to 3.11.

Author: bluesmoon

docs/guides/applications/big-data/manually-deploy-kafka-cluster/index.md

@@ -33,7 +33,7 @@ If you wish to deploy Kafka automatically rather than manually, consider our [Ap
 
 The following software and components must be installed and configured on your local system in order for the provided playbooks to function:
 
--   [Python](https://www.python.org/downloads/) version: > v3.8
+-   [Python](https://www.python.org/downloads/) version: > v3.11
 -   The [venv](https://docs.python.org/3/library/venv.html) Python module
 -   A [Linode API access token](/docs/products/tools/api/get-started/#get-an-access-token)
 -   A configured [SSH key pair](/docs/guides/use-public-key-authentication-with-ssh/) along with your public key
@@ -433,4 +433,4 @@ Familiarize yourself with the official Apache Kafka documentation, including use
 
 -   [Apache Kafka Documentation](https://kafka.apache.org/documentation/)
 -   [Kafka Project Information](https://kafka.apache.org/project)
--   [Kafka Contact Information](https://kafka.apache.org/contact)
+-   [Kafka Contact Information](https://kafka.apache.org/contact)