message: Fix typo in subscriptions.md
diff: @@ -6,7 +6,7 @@ Sofa enables you to run GraphQL Subscriptions through WebHooks. It has a special
  - `POST /webhook` - starts a subscription
  - `DELETE /webhook/:id` - stops it
  -- `POST /webhook/:id`- updats it
  +- `POST /webhook/:id`- updates it
  #### Starting a subscription
  