chore(deps): Bump towncrier from 25.8.0 to 26.9.0

Bumps [towncrier](https://github.com/twisted/towncrier) from 25.8.0 to 26.9.0.
- [Release notes](https://github.com/twisted/towncrier/releases)
- [Changelog](https://github.com/twisted/towncrier/blob/trunk/NEWS.rst)
- [Commits](twisted/towncrier@25.8.0...26.9.0)

---
updated-dependencies:
- dependency-name: towncrier
  dependency-version: 26.9.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

pyproject.toml

@@ -110,7 +110,7 @@ optional-dependencies.dev = [
     "strict-kwargs==2026.8.28.post2",
     "sybil==10.1.0",
     "tenacity==9.1.4",
-    "towncrier==25.8.0",
+    "towncrier==26.9.0",
     "ty==0.0.78",
     "types-docker==7.2.0.20260827",
     "types-pyyaml==6.0.12.20260815",
@@ -124,7 +124,7 @@ optional-dependencies.dev = [
     "yamlfix==1.19.1",
     "zizmor==1.30.0",
 ]
-optional-dependencies.release = [ "check-wheel-contents==0.6.3", "towncrier==25.8.0" ]
+optional-dependencies.release = [ "check-wheel-contents==0.6.3", "towncrier==26.9.0" ]
 urls.Documentation = "https://vws-python.github.io/vws-python-mock/"
 urls.Source = "https://github.com/VWS-Python/vws-python-mock"