Support new stage RC 2 for 4.9.1 in wazuh-docker repository

[juliamagan]

Description

This issue attempts to support a new stage RC 2 for 4.9.1 in the wazuh-docker repository.

Tasks

• Ensure changelog is updated for 4.9.1 (if applicable).
• Bump revision for branch 4.9.1 on wazuh-docker repository.
• Change docker image tag in docker-compose to tag v4.9.1-rc2 in branch 4.9.1
• Create tag v4.9.1-rc2 from branch 4.9.1 on wazuh-docker repository.
• Create and publish a pre-release: https://github.com/wazuh/wazuh-docker/releases/tag/v4.9.1-rc2.
• Change docker image tag in docker-compose back to 4.9.1 in branch 4.9.1

[davidcr01]

LGTM