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](rthalley/dnspython@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

@@ -10,7 +10,7 @@ click-didyoumean==0.3.0
 click-plugins==1.1.1
 click-repl==0.3.0
 Deprecated==1.2.14
-dnspython==2.3.0
+dnspython==2.6.1
 dominate==2.8.0
 email-validator==2.0.0.post2
 Flask==2.3.2