Bump dnspython from 2.3.0 to 2.6.1

Bumps [dnspython](https://github.com/rthalley/dnspython) from 2.3.0 to 2.6.1.
- [Release notes](https://github.com/rthalley/dnspython/releases)
- [Changelog](https://github.com/rthalley/dnspython/blob/main/doc/whatsnew.rst)
- [Commits](https://github.com/rthalley/dnspython/compare/v2.3.0...v2.6.1)

---
updated-dependencies:
- dependency-name: dnspython
  dependency-type: direct:production
...

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

requirements.txt

@@ -31,7 +31,7 @@ jsonpath-ng~=1.5.3
 
 # Pinned: module 'eventlet.green.select' has no attribute 'epoll'
 # https://github.com/eventlet/eventlet/issues/805#issuecomment-1640463482
-dnspython==2.3.0 # related to eventlet fixes
+dnspython==2.6.1 # related to eventlet fixes
 
 # jq not available on Windows so must be installed manually