Move health endpoint from /health to /api/health as expected by our load balancer

greg/urls.py

@@ -35,6 +35,6 @@ urlpatterns: List[URLResolver] = [
         ),  # type: ignore
         name="swagger-ui",
     ),
-    path("health/", Health.as_view()),  # type: ignore
+    path("api/health/", Health.as_view()),  # type: ignore
     path("api/v1/", include((api_urls.urlpatterns, "greg"), namespace="v1")),
 ]