Fix sp_kill README docs to match proc behavior#3886

BrentOzar merged 1 commit intodevBrentOzarULTD/SQL-Server-First-Responder-Kit:devfrom

3885_fix_sp_kill_docsBrentOzarULTD/SQL-Server-First-Responder-Kit:3885_fix_sp_kill_docsCopy head branch name to clipboard