build(deps-dev): update google-cloud-dns requirement

Updates the requirements on [google-cloud-dns](https://github.com/googleapis/python-dns) to permit the latest version.
- [Release notes](https://github.com/googleapis/python-dns/releases)
- [Changelog](https://github.com/googleapis/python-dns/blob/main/CHANGELOG.md)
- [Commits](googleapis/python-dns@v0.32.1...v0.34.1)

---
updated-dependencies:
- dependency-name: google-cloud-dns
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements-dev.txt

@@ -1,3 +1,3 @@
-google-cloud-dns~=0.32.1
+google-cloud-dns~=0.34.1
 pylint~=2.15.5
 coverage~=6.5.0