chore(deps): bump mdformat-gfm from 0.3.5 to 0.3.6 in /tools/sgmdformat

Bumps [mdformat-gfm](https://github.com/hukkinj1/mdformat-gfm) from 0.3.5 to 0.3.6.
- [Commits](hukkin/mdformat-gfm@0.3.5...0.3.6)

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

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

tools/sgmdformat/requirements.txt

@@ -1,2 +1,2 @@
-mdformat-gfm==0.3.5
+mdformat-gfm==0.3.6
 mdformat-admon==1.0.1