TUN-6161: Set git user/email for brew core release

Author: nmldiegues

.teamcity/update-homebrew-core.sh

@@ -19,8 +19,8 @@ eval "$(tmp/homebrew/bin/brew shellenv)"
 brew update --force --quiet
 chmod -R go-w "$(brew --prefix)/share/zsh"
 
-git config user.name "cloudflare-warp-bot"
-git config user.email "[email protected]"
+git config --global user.name "cloudflare-warp-bot"
+git config --global user.email "[email protected]"
 
 # bump formula pr
 brew bump-formula-pr cloudflared --version="$VERSION"