Add missing links for musicals

[brittanyrw]

In the musicals.js file, some objects are missing itemLink. Add them in and link to the correct Playbill.

Link the Playbill archive page for the show. Make sure the Playbill link is for the original production. It will say 'original' under the show name on Playbill. Here is an example of the page you should be linking for musicals.

If the musical has not been on Broadway (it was off-Broadway, West End, etc, then you may skip adding it in for now).

Make sure the link includes https or http at the beginning. The link must be wrapped in quotation marks.

[Khushi-74]

hey @brittanyrw could you please assign this issue to me , I would love to work on it

[shubhalgupta]

@brittanyrw kindly review my PR, please!