Follow-up from "Add Push Rule for DCO Signoff"

The following discussion from !98810 (merged) should be addressed:

• @acroitor started a discussion:

  Question: this is probably non blocking and can be improved in a follow up as well, but does it have to be a case sensitive match or should we allow different casing?

  • Signed-off-by:
  • signed-off-by:
  • SIGNED-OFF-BY: