Bump m2r2 from 0.3.2 to 0.3.3 in /docs (#305)

Bumps [m2r2](https://github.com/crossnox/m2r2) from 0.3.2 to 0.3.3.
- [Release notes](https://github.com/crossnox/m2r2/releases)
- [Changelog](https://github.com/CrossNox/m2r2/blob/development/CHANGES.md)
- [Commits](CrossNox/m2r2@v0.3.2...v0.3.3)

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

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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/requirements.txt

@@ -3,5 +3,5 @@
 
 sphinx==5.1.1
 sphinx-readable-theme==1.3.0
-m2r2==0.3.2
+m2r2==0.3.3
 tomlkit==0.11.3