fix version

Author: pgherveou

crates/cargo-pvm-contract/templates/examples/MyToken.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity ^0.8.27;
+pragma solidity ^0.8.0;
 
 interface MyToken {
     event Transfer(address indexed from, address indexed to, uint256 value);