Add missing stellar typography classes to Input `<label>`

[AaronPlave]

Checked for duplicates

No - I haven't checked

Is this a regression?

No - This is a new bug

Version

develop

Describe the bug

Input should have the same st-typography-body properties that <fieldset> uses.

Reproduction

N/A

Logs

No response

System Info

N/A

Severity

Minor