fix: correct syntax error in XAdES-EPES signature example

[zayarlinnwebster]

Summary

This pull request fixes a small but critical issue in the XAdES-EPES signature code example found in the README. Previously, the call to xadesjs.Application.setEngine("NodeJS", ) was missing the required crypto argument, resulting in invalid JavaScript syntax.

Changes

• Fixed the function call to correctly pass the crypto instance.
• Ensured formatting consistency in the example code.

Impact

This change ensures that users following the example can run the code successfully in a Node.js environment with xadesjs and @peculiar/webcrypto.

Checklist

• Syntax validated
• Example tested for correctness
• Commit message follows conventional format