Issue with hash generation

[tkline615]

Within /src/util/slack.ts I was having problems getting the verifySlackRequest function to match Slack's signature. I'm currently running node v18.17.0 and got it working by adjusting the createHmac function call to include "utf8" as a second argument after the signature base string. My updated and working version is this:

  const hash = createHmac("sha256", secret)
    .update(`v0:${timestamp}:${request.body}`, "utf8")
    .digest("hex");

Wanted to comment to help anyone else out that may experience the same issue.