Bump mike from 2.1.1 to 2.1.3

Bumps [mike](https://github.com/jimporter/mike) from 2.1.1 to 2.1.3.
- [Release notes](https://github.com/jimporter/mike/releases)
- [Changelog](https://github.com/jimporter/mike/blob/master/CHANGES.md)
- [Commits](jimporter/mike@v2.1.1...v2.1.3)

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

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

requirements.txt

@@ -1,5 +1,5 @@
 Markdown==3.5.1
-mike==2.1.1
+mike==2.1.3
 mkdocs-git-revision-date-plugin==0.3.2
 mkdocs-macros-plugin==1.0.5 
 mkdocs-material==9.5.3