Merge pull request #705 from opensafely-core/fix-docs-link

Fix docs link

docs/index.md

@@ -20,8 +20,7 @@ Airlock allows us to enforce some safety controls and policies automatically. Th
     Please ensure you use Chrome when accessing Airlock. Features
     may not work as expected in other browsers.
 
-To access the Airlock system, you will need to [obtain a single user token via the
-Jobs site](https://docs.opensafely.org/jobs-site/#viewing-analysis-outputs-on-the-server),
+To access the Airlock system, you will need to [obtain a single user token via the Jobs site](how-tos/access-airlock/),
 which you can use to login in Airlock in Chrome in the relevant backend.
 
 For more details, see the section on [how to access Airlock](how-tos/access-airlock.md)