Bump django-health-check from 3.17.0 to 3.18.0 in /api_server (#133)

Bumps [django-health-check](https://github.com/revsys/django-health-check) from 3.17.0 to 3.18.0.
- [Release notes](https://github.com/revsys/django-health-check/releases)
- [Changelog](https://github.com/revsys/django-health-check/blob/master/docs/changelog.rst)
- [Commits](revsys/django-health-check@3.17.0...3.18.0)

---
updated-dependencies:
- dependency-name: django-health-check
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

api_server/requirements.txt

@@ -4,7 +4,7 @@ psycopg2-binary==2.9.9
 tzdata==2023.4
 djangorestframework-simplejwt==5.3.1
 gunicorn==21.2.0
-django-health-check==3.17.0
+django-health-check==3.18.0
 whitenoise==6.6.0
 drf-spectacular==0.27.1
 django-nose==1.4.7