[deps] Update pytest-timeout requirement from ~=2.3.0 to ~=2.4.0

Updates the requirements on [pytest-timeout](https://github.com/pytest-dev/pytest-timeout) to permit the latest version.
- [Commits](pytest-dev/pytest-timeout@2.3.0...2.4.0)

---
updated-dependencies:
- dependency-name: pytest-timeout
  dependency-version: 2.4.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements-test.txt

@@ -1,5 +1,5 @@
 pytest-cov~=7.0.0
-pytest-timeout~=2.3.0
+pytest-timeout~=2.4.0
 openwisp-utils[qa,selenium,channels-test] @ https://github.com/openwisp/openwisp-utils/archive/refs/heads/1.3.tar.gz
 django_redis~=6.0.0
 mock-ssh-server~=0.9.1