Bump tzdata from 2023.3 to 2024.1 in /backend/worker

Bumps [tzdata](https://github.com/python/tzdata) from 2023.3 to 2024.1.
- [Release notes](https://github.com/python/tzdata/releases)
- [Changelog](https://github.com/python/tzdata/blob/master/NEWS.md)
- [Commits](python/tzdata@2023.3...2024.1)

---
updated-dependencies:
- dependency-name: tzdata
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

backend/worker/requirements.txt

@@ -30,7 +30,7 @@ six==1.16.0
 threadpoolctl==3.1.0
 tomli==2.0.1
 trustymail @ git+https://github.com/Matthew-Grayson/trustymail@production
-tzdata==2023.3
+tzdata==2024.1
 tzlocal==4.3
 yarg==0.1.9
 wheel==0.38.1