#1402 docs: update register help, non-fast version is supported Pull request opened by pbrogan12 TL;DR Updated register docs since register command supports both fast and non-fast versions Type ☐ Bug Fix ☐ Feature ☐ Plugin Are all requirements met? ☐ Code completed ☐ Smoke tested ☐ Unit tests added ☐ Code documentation added ☐ Any pending items have an associated Issue flyteorg/flytekit ✅ All checks have passed 30/30 successful checks