Bump m2r2 from 0.3.1 to 0.3.2

Bumps [m2r2](https://github.com/crossnox/m2r2) from 0.3.1 to 0.3.2.
- [Release notes](https://github.com/crossnox/m2r2/releases)
- [Changelog](https://github.com/CrossNox/m2r2/blob/development/CHANGES.md)
- [Commits](CrossNox/m2r2@v0.3.1...v0.3.2)

---
updated-dependencies:
- dependency-name: m2r2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

docs/requirements.txt

@@ -1,4 +1,4 @@
 sphinx==4.3.1
 sphinx_rtd_theme==1.0.0
-m2r2==0.3.1
+m2r2==0.3.2
 mistune==0.8.4