Bump towncrier from 23.11.0 to 24.8.0

Bumps [towncrier](https://github.com/twisted/towncrier) from 23.11.0 to 24.8.0.
- [Release notes](https://github.com/twisted/towncrier/releases)
- [Changelog](https://github.com/twisted/towncrier/blob/trunk/NEWS.rst)
- [Commits](twisted/towncrier@23.11.0...24.8.0)

---
updated-dependencies:
- dependency-name: towncrier
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

poetry.lock

@@ -54,7 +54,7 @@ slotscheck = ">=0.16.1,<0.20.0"
 basedpyright = "^1.13.3"
 
 [tool.poetry.group.release.dependencies]
-towncrier = ">=23,<24.7" # temporary pin, as 24.7 is incompatible with sphinxcontrib-towncrier
+towncrier = ">=23,<24.9" # temporary pin, as 24.7 is incompatible with sphinxcontrib-towncrier
 
 [tool.poetry.group.release-ci]
 optional = true