WebHook http header content-type header not set

[HassanMahmud]

Environment

• Deploy method: Tried both cloud and heroku

Description

Content type http header cannot be set.

Steps to reproduce

Create a http destination and add a 'Content-Type: application/json' to the http headers and use something like https://webhook.site/ to see the result of the destination.

Expected behavior

The content type set to application/json.

Actual behavior

You can see the content type is empty.