build(deps): bump fixtures from 4.2.2 to 4.2.4.post1

Bumps [fixtures](https://github.com/testing-cabal/fixtures) from 4.2.2 to 4.2.4.post1.
- [Changelog](https://github.com/testing-cabal/fixtures/blob/master/ChangeLog)
- [Commits](https://github.com/testing-cabal/fixtures/commits)

---
updated-dependencies:
- dependency-name: fixtures
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -33,7 +33,7 @@ ecdsa==0.19.0
 extras==1.0.0
 feedgen==1.0.0
 feedparser==6.0.11
-fixtures==4.2.2
+fixtures==4.2.4.post1
 Flask==3.1.0
 Flask-Caching==2.3.1
 flask-gae-static==1.0