chore(deps): update bitnami/discourse docker tag to v3.4.4

[renovate]

This PR contains the following updates:

Package	Update	Change
bitnami/discourse (source)	patch	3.4.3 -> 3.4.4

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[wanghe-fit2cloud]

The provided YAML code snippet contains no errors or issues. It correctly changes the image reference from version 3.4.3 to 3.4.4 for both the discourse and sidekiq services in a Docker Compose configuration file. The change ensures that any newer features or bug fixes introduced in version 3.4.4 are applied where applicable.

For optimization, there may be general best practices related to updating container images based on available security patches but these would not apply to this specific case of an updated tag within the same major release series (3.x.x). However, ensuring all containers are running the latest patch level is generally recommended practice to maintain stability and protect against vulnerabilities.