build(deps): bump taskcluster from 95.1.4 to 96.2.3 in /backend

Bumps [taskcluster](https://github.com/taskcluster/taskcluster) from 95.1.4 to 96.2.3.
- [Release notes](https://github.com/taskcluster/taskcluster/releases)
- [Changelog](https://github.com/taskcluster/taskcluster/blob/main/CHANGELOG.md)
- [Commits](taskcluster/taskcluster@v95.1.4...v96.2.3)

---
updated-dependencies:
- dependency-name: taskcluster
  dependency-version: 96.2.3
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

backend/requirements.txt

@@ -10,6 +10,6 @@ psycopg2-binary==2.9.11
 sentry-sdk==2.52.0
 setuptools==80.9.0
 sqlparse==0.5.4
-taskcluster==95.1.4
+taskcluster==96.4.0
 tqdm==4.67.3
 whitenoise==6.11.0