Updating the instructions - now that I have updated gokeyless packages to sign with both keys. Will check in with TUN team to release.
Closes SECENG-13056
* chore: Update cloudflared signing key name in index.html
We want to preserve the old key name so that we don't have to update the dev docs.
We will have the same key under this name and the v2 name to account for everyone who has already updated.