Extra value secrets_group in header during device csv export

[jakubkrysl]

Environment

• Python version: 3.6.15
• Nautobot version: v1.2.7

When exporting csv in UI for device, there is extra value in header that has no data. This results in all data after it being shifted left by 1 position.
Easily reproducible on demo.nautobot.com, the device needs to have some data in comments (as there are no custom fields for devices)
Create CSV export from this view: https://demo.nautobot.com/dcim/devices/?q=+ams01-dist-01

The data from comment is shifted to secrets_group column.

Steps to Reproduce

1. Have device with data in comment or some custom field
2. Export CSV from UI
3. Check if data are in correct columns

Expected Behavior

Data in correct columns

Observed Behavior

Data shifted left by 1 column because header contains extra column secrets_group that has no data generated for it

[glennmatthews]

Thanks for the report! This appears to just be a missing entry in the Device.to_csv() method, should be a very straightforward fix.