prakriya: show final form at the end

[shreevatsa]

Initial feedback from https://groups.google.com/g/sanskrit-programmers/c/si3PmK_hShQ/m/FHXJJ1ZzCAAJ

Also at the end of the prakriya, it would make sense to show the final form as the last step.

Probably simplest to simply append the final form again, as another row in the table (repeating the form shown above the table).

[akprasad]

Fixed by Shreevatsa in #33.