Update m2r2 requirement from ~=0.3.3.post2 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@v0.3.3.post2...v0.3.4)

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

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

Author: dependabot[bot]

requirements.txt

@@ -9,7 +9,7 @@ idna~=3.10
 imagesize~=1.4.1
 Jinja2~=3.1.6
 lxml~=5.4.0
-m2r2~=0.3.3.post2
+m2r2~=0.3.4
 MarkupSafe~=3.0.2
 mistune~=0.8.4
 packaging~=25.0