docs: def is_github_ip(ip_str):
      """Verify that an IP address is owned by GitHub."""
      if isinstance(ip_str, bytes):
          ip_str = ip_str.decode()
  
      ip = ipaddress.ip_address(ip_str)
      if ip.version == 6 and ip.ipv4_mapped:
          ip = ip.ipv4_mapped
  
      for block in load_github_hooks():
          if ip in ipaddress.ip_network(block):
              return True
      return False