Update Tessen docs to include dns name - tession.sensu.io

[jhenderson-pro]

Description

Category

This is an issue with:

• errata (error in doc content)
• new doc (requires a completely new doc)
• update (add missing or refresh existing content)
• improvement (improve docs content or format)

Affected pages

https://docs.sensu.io/sensu-go/latest/operations/monitor-sensu/tessen/

Expected behavior

Current behavior

Corrections needed

Requesting to add a note regarding the DNS address that receives Tessen traffic is tessen.sensu.io

Screenshots

Additional context

This initially came up in conversation related to this Discourse post:
https://discourse.sensu.io/t/sensu-backend-connecting-out-to-us-west-2-compute-amazonaws-com/3074

• Browser(s) and version(s):
• OS: