fix: error in hardhat deployed func, use new Hardhat deploy func

[0xemrekaya]

Description:
This Pull Request includes the following changes to use the new deploy features of Hardhat v2.0.0^:

• The deployContract() function is used instead of the old getContractFactory() and deploy() functions.
• New getAddress() function is used instead of old address.

WHY?
In Hardhat v2.0.0, a number of changes were made to the deploy process, including the deployContract and waitForDeployment functions. So the old code was not working, so I updated it with the new version.

the old code has a error:

If you need more information about Hardhat v2.0.0^ check this guides: https://hardhat.org/hardhat-runner/docs/guides/deploying

[0xemrekaya]

@fede2442 Could you check this PR?, thanks sir.

[joshuanwankwo]

Checked and figured out that hardhat included hardhat ignition into their building and deployment flow, we'll need to update the entire article.

@0xemrekaya thanks for pointing this out.