"Add export template" button doesn't pass content type

[alehaa]

Deployment Type

Self-hosted

NetBox Version

v3.7.2

Python Version

3.11

Steps to Reproduce

1. Navigate to Customization > Export Templates.
2. Click button Export > Add export template...

Expected Behavior

Form has field Content types prefilled.

Observed Behavior

Field Content types is empty, as URL parameter is not properly set. It needs to be content_types not content_type (missing s).

I can provide a PR for this issue.

[jeremystretch]

1. Navigate to Customization > Export Templates.

Just to clarify because this could be confusing: The bug affects the "add export template" dropdown item under the "export" button for all objects.