chore(deps): bump fonttools from 4.55.7 to 4.55.8 in /source

Bumps [fonttools](https://github.com/fonttools/fonttools) from 4.55.7 to 4.55.8.
- [Release notes](https://github.com/fonttools/fonttools/releases)
- [Changelog](https://github.com/fonttools/fonttools/blob/main/NEWS.rst)
- [Commits](fonttools/fonttools@4.55.7...4.55.8)

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

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

source/requirements.txt

@@ -74,7 +74,7 @@ feedgen==0.9.0
     # via
     #   -r source/requirements.txt
     #   ablog
-fonttools==4.55.7
+fonttools==4.55.8
     # via
     #   -r source/requirements.txt
     #   matplotlib