Update to GC margins (#4089)
Update to GC margins (#4089)

Update GC margins

StefanoRaggi/Lean,jameschch/Lean,StefanoRaggi/Lean,QuantConnect/Lean,jameschch/Lean,JKarathiya/Lean,QuantConnect/Lean,QuantConnect/Lean,AlexCatarino/Lean,jameschch/Lean,jameschch/Lean,JKarathiya/Lean,QuantConnect/Lean,AlexCatarino/Lean,JKarathiya/Lean,jameschch/Lean,StefanoRaggi/Lean,AlexCatarino/Lean,StefanoRaggi/Lean,AlexCatarino/Lean,JKarathiya/Lean,StefanoRaggi/Lean