Update towncrier requirement from ~=23.6 to ~=23.10 (#9205)

Updates the requirements on [towncrier](https://github.com/twisted/towncrier) to permit the latest version.
- [Release notes](https://github.com/twisted/towncrier/releases)
- [Changelog](https://github.com/twisted/towncrier/blob/trunk/NEWS.rst)
- [Commits](twisted/towncrier@23.6.0...23.10.0)

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

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

Author: dependabot[bot]

doc/requirements.txt

@@ -1,5 +1,5 @@
 Sphinx==7.2.6
 sphinx-reredirects<1
-towncrier~=23.6
+towncrier~=23.10
 furo==2023.9.10
 -e .

requirements_test_min.txt

@@ -6,7 +6,7 @@ py~=1.11.0
 pytest~=7.4
 pytest-benchmark~=4.0
 pytest-timeout~=2.2
-towncrier~=23.6
+towncrier~=23.10
 requests
 # Voluntary for test purpose, not actually used in prod, see #8904
 setuptools==41.6.0