Bump fonttools from 4.55.3 to 4.55.6

Bumps [fonttools](https://github.com/fonttools/fonttools) from 4.55.3 to 4.55.6.
- [Release notes](https://github.com/fonttools/fonttools/releases)
- [Changelog](https://github.com/fonttools/fonttools/blob/main/NEWS.rst)
- [Commits](fonttools/fonttools@4.55.3...4.55.6)

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

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

requirements_frozen.txt

@@ -2,7 +2,7 @@ clarabel==0.9.0
 contourpy==1.3.1
 cvxpy==1.6.0
 cycler==0.12.1
-fonttools==4.55.3
+fonttools==4.55.6
 jinja2==3.1.5
 kiwisolver==1.4.8
 loguru==0.7.3