Backport of Update lock.mdx (Node Health Check and TTL) into release/1.20.x#22262

hc-github-team-consul-core wants to merge 2 commits intorelease/1.20.xhashicorp/consul:release/1.20.xfrom

backport/docs-consul-lock-update/widely-allowing-eelhashicorp/consul:backport/docs-consul-lock-update/widely-allowing-eelCopy head branch name to clipboard