SnackBar: Center align the "OK" label inside the button

[banobepascal]

This is an Easy Hack. Potential mentors: @banobepascal @Darshan-upadhyay1110

Description

The "OK" button in the feedback prompt currently has its label left aligned instead of centered. Update the button styles so that the "OK" label is perfectly centered both horizontally within the button.

Additional notes, tips & tricks

We need to add justify-content: center to the button