Upgraded react-display-hierarchy sample to v1.18.2

[nanddeepn]

• [x] Bug fix/update
• [x] Related issues: fixes #5114, #5115, #5116

What's in this Pull Request?

• Upgraded react-display-hierarchy sample to v1.18.2
• Upgraded to @pnp/sp

Node Version

Node version used: 18.18.0

Checklist

• [x] My pull request affects only ONE sample.
• [x] My sample builds without any warnings
• [x] I have updated the README.md file's Version history. For new samples, created a new README.md file matching this template
• [x] My README.md has at least one static high-resolution screenshot (i.e. not a GIF) located in the assets folder.
• [x] My README.md contains complete setup instructions, including pre-requisites and permissions required
• [x] My solution includes a .nvmrc file indicating the version of Node.js