feat: add brew job to publish.yaml

ci/steps/brew-bump.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+main() {
+  cd "$(dirname "$0")/../.."
+  # Only sourcing this so we get access to $VERSION
+  source ./ci/lib.sh
+  # Find the docs for bump-formula-pr here
+  # https://github.com/Homebrew/brew/blob/master/Library/Homebrew/dev-cmd/bump-formula-pr.rb#L18
+  brew bump-formula-pr --force --version="${VERSION}" code-server --no-browse --no-audit
+}
+
+main "$@"