Bump fonttools from 4.50.0 to 4.51.0

Bumps [fonttools](https://github.com/fonttools/fonttools) from 4.50.0 to 4.51.0.
- [Release notes](https://github.com/fonttools/fonttools/releases)
- [Changelog](https://github.com/fonttools/fonttools/blob/main/NEWS.rst)
- [Commits](fonttools/fonttools@4.50.0...4.51.0)

---
updated-dependencies:
- dependency-name: fonttools
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -89,7 +89,7 @@ executing==2.0.1
     # via stack-data
 fastjsonschema==2.19.1
     # via nbformat
-fonttools==4.50.0
+fonttools==4.51.0
     # via matplotlib
 fsspec==2024.3.1
     # via dask