feat: use sha256 for webpack

[PeterSchafer]

• Follows CONTRIBUTING rules

What does this PR do?

In the preparation of FIPS support, we are removing the usage of unsupported cryptographic algorithms.

[github-actions]

	Warnings
⚠️	Since the CLI is unifying on a standard and improved tooling, we're starting to migrate old-style imports and exports to ES6 ones. A file you've modified is using either module.exports or require(). If you can, please update them to ES6 import syntax and export syntax. Files found: webpack.common.ts

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