Update advance_nonce_account.rs (#271)

* Update advance_nonce_account.rs

* Update upgrade_nonce_account

- Using array slices directly

* Keeping existing comment

Author: dedeleono

programs/system/src/instructions/advance_nonce_account.rs

@@ -41,7 +41,7 @@ impl AdvanceNonceAccount<'_> {
         let instruction = Instruction {
             program_id: &crate::ID,
             accounts: &account_metas,
-            data: &[4],
+            data: &[4, 0, 0, 0],
         };
 
         invoke_signed(

programs/system/src/instructions/upgrade_nonce_account.rs

@@ -25,7 +25,7 @@ impl UpgradeNonceAccount<'_> {
         let instruction = Instruction {
             program_id: &crate::ID,
             accounts: &account_metas,
-            data: &[12],
+            data: &[12, 0, 0, 0],
         };
 
         invoke(&instruction, &[self.account])