Upgrade react-directory to SPFx 1.20.0

[Sandeep-FED]

To submit a pull request with multiple authors, make sure that at least one commit is a co-authored commit by adding a Co-authored-by: trailer to the commit's message. E.g.: Co-authored-by: name <[email protected]>

Put an x in all the items that apply ([x], no spaces between the [, the x, and the ] ), make notes next to any that haven't been addressed.

• Bug fix/update
• New sample
• Related issues: fixes #X, partially #Y, mentioned in #Z

What's in this Pull Request?

This is an upgrade PR of react-directory for hacktoberfest.

Node version used:
18.18.2

Checklist

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

[Adam-it]

Thank you for opening a PR to our samples repo and helping us upgrade our project 👍
We will try to review this PR ASAP

[hugoabernier]

Many thanks @Sandeep-FED for your update! Always appreciated!.

Thank you for sharing your sample with others - you rock! 👏🥇👩‍💻