chore(deps): update m2r2 requirement from >=0.3.2 to >=0.3.4

Updates the requirements on [m2r2](https://github.com/crossnox/m2r2) to permit the latest version.
- [Changelog](https://github.com/CrossNox/m2r2/blob/development/CHANGES.md)
- [Commits](CrossNox/m2r2@v0.3.2...v0.3.4)

---
updated-dependencies:
- dependency-name: m2r2
  dependency-version: 0.3.4
  dependency-type: direct:production
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -1,4 +1,4 @@
-m2r2>=0.3.2
+m2r2>=0.3.4
 sphinx>=8,<9
 sphinx-autoapi>=3,<4
 sphinx-rtd-theme>=3,<4