build(deps): bump fonttools from 4.29.1 to 4.43.0 in /docs

Bumps [fonttools](https://github.com/fonttools/fonttools) from 4.29.1 to 4.43.0.
- [Release notes](https://github.com/fonttools/fonttools/releases)
- [Changelog](https://github.com/fonttools/fonttools/blob/main/NEWS.rst)
- [Commits](fonttools/fonttools@4.29.1...4.43.0)

---
updated-dependencies:
- dependency-name: fonttools
  dependency-type: direct:production
...

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

docs/requirements.txt

@@ -29,7 +29,7 @@ entrypoints==0.4; python_full_version >= "3.7.1" and python_version < "4" and py
 executing==0.8.2; python_full_version >= "3.6.2" and python_version >= "3.8"
 filelock==3.6.0; python_version >= "3.7" and python_full_version >= "3.6.1"
 flake8==4.0.1; python_version >= "3.6"
-fonttools==4.29.1; python_version >= "3.7"
+fonttools==4.43.0; python_version >= "3.7"
 ghp-import==2.0.2; python_full_version >= "3.7.1" and python_version < "4" and python_version >= "3.7"
 gitdb==4.0.9; python_version >= "3.7"
 gitpython==3.1.27; python_version >= "3.7"