This snippet will install as many Github runners you want

PAT = personal access token (generate at your account, settings -> developers settings -> PAT)
START = define start number, 0001, 0002, ... 01,02
STOP  = define stop number
NAME = name / keyword of this runner group

Token needs:

• admin:org Full control of orgs and teams, read and write org projects
• write:org Read and write org and team membership, read and write org projects
• read:org Read org and team membership, read org projects
• manage_runners:org Manage org runners and runner groups