deps: update dependency antsibull-docs to >=2.11,<2.12

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
antsibull-docs (changelog)	>=2.10,<2.11 -> >=2.11,<2.12

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Release Notes

ansible-community/antsibull-docs (antsibull-docs)

### [`v2.11.0`](https://togithub.com/ansible-community/antsibull-docs/releases/tag/2.11.0) [Compare Source](https://togithub.com/ansible-community/antsibull-docs/compare/2.10.0...2.11.0) ##### Release Summary Feature and bugfix release. ##### Minor Changes - Support examples for role entrypoints ([#​244](https://togithub.com/ansible-community/antsibull-docs/pull/244)). ##### Bugfixes - Fix handling of choices that are dictionaries for type=list ([#​276](https://togithub.com/ansible-community/antsibull-docs/pull/276)). - Fix handling of default for type=list if choices is present ([#​276](https://togithub.com/ansible-community/antsibull-docs/pull/276)).

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