Bump dnspython from 2.6.1 to 2.7.0 (#2440)

* Bump dnspython from 2.6.1 to 2.7.0

Bumps [dnspython](https://github.com/rthalley/dnspython) from 2.6.1 to 2.7.0.
- [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/v2.6.1...v2.7.0)

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

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

* Update dnspython==2.7.0

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: JonnyWong16 <9099342+JonnyWong16@users.noreply.github.com>

[skip ci]

lib/dns/transaction.py

@@ -486,7 +486,7 @@ class Transaction:
                         if exact:
                             raise DeleteNotExact(f"{method}: missing rdataset")
                     else:
-                        self._delete_rdataset(name, rdtype, covers)
+                        self._checked_delete_rdataset(name, rdtype, covers)
                     return
                 else:
                     rdataset = self._rdataset_from_args(method, True, args)
@@ -529,8 +529,6 @@ class Transaction:
 
     def _end(self, commit):
         self._check_ended()
-        if self._ended:
-            raise AlreadyEnded
         try:
             self._end_transaction(commit)
         finally: