Bump maturin from 1.7.8 to 1.8.1 in the dependencies group

Bumps the dependencies group with 1 update: [maturin](https://github.com/pyo3/maturin).


Updates `maturin` from 1.7.8 to 1.8.1
- [Release notes](https://github.com/pyo3/maturin/releases)
- [Changelog](https://github.com/PyO3/maturin/blob/main/Changelog.md)
- [Commits](PyO3/maturin@v1.7.8...v1.8.1)

---
updated-dependencies:
- dependency-name: maturin
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dependencies
...

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

citiespy/requirements_dev.txt

@@ -1,4 +1,4 @@
-maturin==1.7.8
+maturin==1.8.1
 pytest
 pytest-benchmark
 pytest-cov