TUN-6197: Publish to brew core should not try to open the browser

The publish to brew core prints a URL with a PR that does the change
in github to brew core formula for cloudflared. It then tries to open
the browser, which obviously fails in CI.
So this adds a flag for it to skip opening the browser.

It's not clear how the PR will be opened, it seems like it must be
done by a human.
But at least this won't fail the build.

Author: nmldiegues

.teamcity/update-homebrew-core.sh

@@ -23,4 +23,4 @@ git config --global user.name "cloudflare-warp-bot"
 git config --global user.email "[email protected]"
 
 # bump formula pr
-brew bump-formula-pr cloudflared --version="$VERSION"
+brew bump-formula-pr cloudflared --version="$VERSION" --no-browse