and trying to deploy a smart contract using forge tool in foundry toolchain i am getting this error:

Error: 
Could not find target contract

while trying to run:

forge script script/DeploySimpleStorage.s.sol

and here is my deployment script:

//SPDX-License-Identifier:MIT

pragma solidity ^0.8.18;

import {Script} from "forge-std/Script.sol";
import {SimpleStorage} from "../src/SimpleStorage.sol";

contract DeploySimpleStorage is Script {
    function run() external returns (SimpleStorage) {
        vm.startBroadcast();
        SimpleStorage simpleStorage = new SimpleStorage();
        vm.stopBroadcast();
        return simpleStorage;
    }
}

and here is the SimpleStorage contract i want to deploy

// I'm a comment!
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.18;

// pragma solidity ^0.8.0;
// pragma solidity >=0.8.0 <0.9.0;

contract SimpleStorage {
    uint256 myFavoriteNumber;

    struct Person {
        uint256 favoriteNumber;
        string name;
    }
    // uint256[] public anArray;
    Person[] public listOfPeople;

    mapping(string => uint256) public nameToFavoriteNumber;

    function store(uint256 _favoriteNumber) public {
        myFavoriteNumber = _favoriteNumber;
    }

    function retrieve() public view returns (uint256) {
        return myFavoriteNumber;
    }

    function addPerson(string memory _name, uint256 _favoriteNumber) public {
        listOfPeople.push(Person(_favoriteNumber, _name));
        nameToFavoriteNumber[_name] = _favoriteNumber;
    }
}

my contract is in src folder and my deployment script in script folder

this should give script ran successful output