Bump tinycss2 from 1.3.0 to 1.4.0

Bumps [tinycss2](https://github.com/Kozea/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
...

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

requirements.txt

@@ -114,7 +114,7 @@ asgiref==3.8.1
 
 backports.zoneinfo;python_version<"3.9"
 webencodings==0.5.1 # django-markdownify
-tinycss2==1.3.0 # django-markdownify
+tinycss2==1.4.0 # django-markdownify
 bleach==6.1.0 # django-markdownify
 django-markdownify==0.9.5