Describe the bug
Documentation does not point out any example or code block on how to set a footer for each HTML document. It says that it needs to happen on base plugin configuration but there is no code block or example that shows such a usage.

Expected behaviour
Document should clearly set an example on how to modify footer and/or other frontend properties

To Reproduce
Visit this link to see the issue yourself
https://kotlin.github.io/dokka/1.5.30/user_guide/base-specific/frontend/#modifying-footer

Dokka configuration
I'm trying to configure DokkaHtmlModule with an additional footer configuration using Android project level build gradle and module level build.gradles

Installation

• Operating system: macOS
• Build tool: Gradle v7.0.2
• Dokka version: 1.4.32

Are you willing to provide a PR?
This issue is better to be tackled by someone who has knowledge of the plugin usage.