Fix typo

Author: NicolasDorier

bip-0078.mediawiki

@@ -442,7 +442,7 @@ public async Task<PSBT> RequestPayjoin(
     ////////////
 
     if (proposal.CheckSanity() is List<PSBTError> errors && errors.Count > 0)
-        throw new PayjoinSenderException($"The proposal PSBT is not insance ({errors[0]})");
+        throw new PayjoinSenderException($"The proposal PSBT is not sane ({errors[0]})");
 
     var proposalGlobalTx = proposal.GetGlobalTransaction();
     // Verify that the transaction version, and nLockTime are unchanged.
@@ -571,7 +571,7 @@ int GetVirtualSize(ScriptPubKeyType? scriptPubKeyType)
     }
 }
 
-// Finalized the signedPSBT and remove confidential information
+// Finalize the signedPSBT and remove confidential information
 PSBT CreateOriginalPSBT(PSBT signedPSBT)
 {
     var original = signedPSBT.Clone();