Bump dnspython from 2.3.0 to 2.6.1 (#350)

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: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -196,7 +196,7 @@ djangorestframework==3.14.0
     #   drf-yasg
 djangorestframework-simplejwt[crypto]==5.2.2
     # via -r requirements.in
-dnspython==2.3.0
+dnspython==2.6.1
     # via exchangelib
 drf-oidc-auth==0.10.0
     # via -r requirements.in