Fix async-function doc broken link in swagger
The documentation for async-function pointed to
the old faas/guide and should be to docs.openfaas.com
@@ -160,7 +160,7 @@ paths:
post:
summary: 'Invoke a function asynchronously in OpenFaaS'
description: >-
- See https://github.com/openfaas/faas/blob/master/guide/asynchronous.md.
+ See https://docs.openfaas.com/reference/async/.
parameters:
- in: path
name: functionName
