Update dotenv config import in bot.js

[supercrafter100]

To address this pr comment, I overlooked this file and originally assumed it was updated here too. Hence why it wasn't included in my original #13 pull request

[dipamsen]

I am thinking if we should instead use dotenv.config() everywhere (because that's what is shown in the video). Is there a preferred way to do this? (I don't think so)

[supercrafter100]

Usually destructuring is preferred for memory usage as you're only storing what you strictly want in the variable instead of the entirety of what dotenv exports.

[shiffman]

I don't mind if the video is slightly different, I can always add code comments here with further explanation. Feel free to help annotate if you like! Will merge for now. @supercrafter100 are you in the coding train discord?

[supercrafter100]

I am yeah. Username is the same as my GitHub name.