Merge pull request #15086 from nextcloud/backport/15085/stable34

[stable34] ci: allow manual deploy via workflow_dispatch

Merge pull request #15056 from nextcloud/copilot/backport-pr-15050

[stable34] Backport #15050: rename OpenAPI workflow file

Merge pull request #15027 from nextcloud/workflow/update-.github/work…

…flows/sphinxbuild.yml-stable34

[stable34] chore: update `.github/workflows/sphinxbuild.yml` from the master branch

Merge pull request #15029 from nextcloud/workflow/update-.github/work…

…flows/sphinxbuild.yml-stable33

[stable33] chore: update `.github/workflows/sphinxbuild.yml` from master + fix lychee CI