Update bip-0141.mediawiki

Author: jl2012

bip-0141.mediawiki

@@ -118,7 +118,7 @@ Sigops in the current pubkey script, signature script, and P2SH check script are
 The sigop limit is likewise quadrupled to ≤ 80,000.
 
 In addition, opcodes within the witness program are counted identical to as previously within the P2SH check script.
-That is, CHECKSIG in a witness program is counted as only 1 sigop, and m-of-n CHECKMULTISIG in a witness program is counted as n sigop. This rule applies to both native witness program and P2SH witness program.
+That is, CHECKSIG in a witness program is counted as only 1 sigop, and CHECKMULTISIG in a witness program is counted as 1 to 20 sigops according to the arguments. This rule applies to both native witness program and P2SH witness program.
 
 == Examples ==