Bump dnspython from 2.5.0 to 2.6.1

Bumps [dnspython](https://github.com/rthalley/dnspython) from 2.5.0 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@v2.5.0...v2.6.1)

---
updated-dependencies:
- dependency-name: dnspython
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -6,5 +6,5 @@ termcolor==2.4.0
 dnsdumpster==0.8
 tabulate==0.9.0
 beautifulsoup4==4.12.3
-dnspython==2.5.0
+dnspython==2.6.1
 GitPython==3.1.41