Bump glyphslib from 6.9.2 to 6.9.4 in the python-packages group

Bumps the python-packages group with 1 update: [glyphslib](https://github.com/googlefonts/glyphsLib).


Updates `glyphslib` from 6.9.2 to 6.9.4
- [Release notes](https://github.com/googlefonts/glyphsLib/releases)
- [Commits](googlefonts/glyphsLib@v6.9.2...v6.9.4)

---
updated-dependencies:
- dependency-name: glyphslib
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: python-packages
...

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

requirements.txt

@@ -1,7 +1,7 @@
 aiohttp==3.10.10
 cattrs==24.1.2
 fonttools[ufo,unicode]==4.54.1
-glyphsLib==6.9.2
+glyphsLib==6.9.4
 pyyaml==6.0.2
 ufomerge==1.8.2
 unicodedata2==15.1.0