Fix typo

Author: BeMg

llvm/lib/Target/RISCV/RISCVFeatures.td

@@ -39,7 +39,7 @@ class RISCVExtension<string name, int major, int minor, string desc,
 
 // The groupID/bitmask of RISCVExtension is used to retrieve a specific bit value 
 // from __riscv_feature_bit based on the groupID and bitmask.
-// gourpID      - groupID of extension
+// groupID      - groupID of extension
 // bitmaskShift - bitmask shift of extension
 class RISCVExtensionBitmask<bits<3> groupID, int bitmaskShift> {
     int GroupID = groupID;