Bump apidoctor from 75f404b to 6b40b1e

Bumps [apidoctor](https://github.com/OneDrive/apidoctor) from `75f404b` to `6b40b1e`.
- [Commits](OneDrive/apidoctor@75f404b...6b40b1e)

---
updated-dependencies:
- dependency-name: apidoctor
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]