[manual] Change API URLs to be based on api.humbughq.com/api.

This must be deployed after we update our running nginx configuration
to serve api.humbughq.com.

(imported from commit b5c34ebdd595f55eecd6dca6a18a37f105107bd5)

bots/check-mirroring

@@ -15,7 +15,7 @@ parser.add_option('--verbose',
                   action='store_true')
 parser.add_option('--site',
                   dest='site',
-                  default="https://humbughq.com",
+                  default="https://api.humbughq.com",
                   action='store')
 parser.add_option('--sharded',
                   default=False,