chore(deps): update dnspython requirement

Updates the requirements on [dnspython](https://github.com/rthalley/dnspython) to permit the latest version.

Updates `dnspython` to 2.8.0
- [Release notes](https://github.com/rthalley/dnspython/releases)
- [Changelog](https://github.com/rthalley/dnspython/blob/main/doc/whatsnew.rst)
- [Commits](rthalley/dnspython@v2.7.0...v2.8.0)

---
updated-dependencies:
- dependency-name: dnspython
  dependency-version: 2.8.0
  dependency-type: direct:production
  dependency-group: pip-test-e2e2
...

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

Author: dependabot[bot]

test/e2e2/requirements.txt

@@ -2,4 +2,4 @@ pytest
 pytest-schema
 pytest-xdist
 requests
-dnspython~=2.7.0
+dnspython~=2.8.0