Bump fonttools from 4.53.1 to 4.55.1 in /etc/requirements_dependabot

Bumps [fonttools](https://github.com/fonttools/fonttools) from 4.53.1 to 4.55.1.
- [Release notes](https://github.com/fonttools/fonttools/releases)
- [Changelog](https://github.com/fonttools/fonttools/blob/main/NEWS.rst)
- [Commits](fonttools/fonttools@4.53.1...4.55.1)

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

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

etc/requirements_dependabot/requirements_tests.txt

@@ -48,7 +48,7 @@ flake8==7.1.1
     #   market_analy (pyproject.toml)
 flake8-docstrings==1.7.0
     # via market_analy (pyproject.toml)
-fonttools==4.53.1
+fonttools==4.55.1
     # via matplotlib
 idna==3.10
     # via requests