Update chat-utils.ts to tsc build solution

[gusta4321]

This function was causing errors when compiling using tsc. I added the 'number' function to convert the value and fix the compilation issue with tsc.

[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@gusta4321/Baileys#patch-2
# YARN v2
yarn add @whiskeysockets/baileys@gusta4321/Baileys#patch-2