Bump fonttools from 4.38.0 to 4.56.0 in /tools

Bumps [fonttools](https://github.com/fonttools/fonttools) from 4.38.0 to 4.56.0.
- [Release notes](https://github.com/fonttools/fonttools/releases)
- [Changelog](https://github.com/fonttools/fonttools/blob/main/NEWS.rst)
- [Commits](fonttools/fonttools@4.38.0...4.56.0)

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

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

tools/ci/requirements_build.txt

@@ -1,5 +1,5 @@
 cairocffi==1.4.0
-fonttools==4.38.0
+fonttools==4.56.0
 genshi==0.7.7
 jinja2==3.1.2
 pyyaml==6.0