Bump mike from 2.1.3 to 2.1.4

Bumps [mike](https://github.com/jimporter/mike) from 2.1.3 to 2.1.4.
- [Release notes](https://github.com/jimporter/mike/releases)
- [Changelog](https://github.com/jimporter/mike/blob/master/CHANGES.md)
- [Commits](jimporter/mike@v2.1.3...v2.1.4)

---
updated-dependencies:
- dependency-name: mike
  dependency-version: 2.1.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]