Indicator that payment is required to auto update paid apps

### What Happened?

Now that AppCenter has automatic updates, we should be up front that paid apps require payment for this feature

### Steps to Reproduce

1. Install a paid app without paying
2. Enabled auto updates
3. See that unpaid apps don't auto update

### Expected Behavior

Some kind of UI copy like:


### OS Version

7.x (Early Access)

### Software Version

Compiled from git

### Log Output

_No response_

### Hardware Info

_No response_