Bump fonttools from 4.55.3 to 4.55.6 in /requirements

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/editor-requirements.txt

@@ -30,7 +30,7 @@ decorator==5.1.1
 defusedxml==0.7.1
 executing==2.1.0
 fastjsonschema==2.21.1
-fonttools==4.55.3
+fonttools==4.55.6
 fqdn==1.5.1
 h11==0.14.0
 httpcore==1.0.7