build(deps): bump tinycss2 from 1.3.0 to 1.4.0 in the general group

Bumps the general group with 1 update: [tinycss2](https://github.com/Kozea/tinycss2).


Updates `tinycss2` from 1.3.0 to 1.4.0
- [Release notes](https://github.com/Kozea/tinycss2/releases)
- [Changelog](https://github.com/Kozea/tinycss2/blob/main/docs/changelog.rst)
- [Commits](Kozea/tinycss2@v1.3.0...v1.4.0)

---
updated-dependencies:
- dependency-name: tinycss2
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: general
...

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

requirements.txt

@@ -78,7 +78,7 @@ setuptools==75.2.0
 six==1.16.0
 soupsieve==2.6
 stack-data==0.6.3
-tinycss2==1.3.0
+tinycss2==1.4.0
 tornado==6.4.1
 traitlets==5.14.3
 wakepy==0.10.1