Variable contents are formatted using markdown

[Nothing4You]

Summary

Currently output is interpreted as markdown and therefore e.g. underscores don't show in the output.

E.g. event_definition_type from the test notification is displayed as eventdefinitiontype.

Environment

Graylog Web Interface version: Graylog 3.3.8+e223f85
Graylog MS Teams Plugin version: 2.0.3

To Reproduce

Send a test notification.

Expected behavior

Field names and message contents should be displayed in their original form.
One possible fix could be to provide a way to markdown-escape all variable contents or provide a way to explicitly add escaping to certain variables.

Screenshots