Add Update Contact Function

[jianhuihi]

Added updateContact function to handle updating contact information.

[whiskeysockets-bot]

Thanks for your contribution.

The next step is to wait for review and approval to merge it to main repository

The community can help reacting with a thumb up (:thumbsup:) for approval and rocket (:rocket:) for who has tested it.

To test this PR you can run the following command below:

# NPM
npm install @whiskeysockets/baileys@jianhuihi/Baileys#updatecontact
# YARN v2
yarn add @whiskeysockets/baileys@jianhuihi/Baileys#updatecontact

[bobslavtriev]

??????????

messy