Fixes 8143 shortens path to Demos

[himanshugarg]

Issue number that this PR fixes (if any). For example: 'Fixes #987654321'

Fixes #8143

What was wrong/why is this fix needed? (quick summary only)

Previous name was too long

Anything else that could help us review it

In one of the source links, I have added an anchor for #canvas . It wasn't there earlier.

~/content$ yarn content move Web/Demos_of_open_web_technologies Web/Demos
yarn run v1.22.11
$ env-cmd --silent cross-env CONTENT_ROOT=files node node_modules/@mdn/yari/tool/cli.js move Web/Demos_of_open_web_technologies Web/Demos
Will move 1 documents from Web/Demos_of_open_web_technologies to Web/Demos for en-US
Web/Demos_of_open_web_technologies → Web/Demos
? Proceed? Yes
Moved 1 documents.
Done in 15.03s.

[github-actions]

Preview URLs

• https://pr8557.content.dev.mdn.mozit.cloud/en-US/docs/Web/CSS
• https://pr8557.content.dev.mdn.mozit.cloud/en-US/docs/Web/Demos
• https://pr8557.content.dev.mdn.mozit.cloud/en-US/docs/Web/HTML/Element/canvas

Flaws

Note! 2 documents with no flaws that don't need to be listed. 🎉

URL: /en-US/docs/Web/Demos
Title: Demos of open web technologies
on GitHub
Flaw count: 1

• broken_links:
  • Is currently http:// but can become https://

External URLs

URL: /en-US/docs/Web/Demos
Title: Demos of open web technologies
on GitHub

No new external URLs

---

URL: /en-US/docs/Web/HTML/Element/canvas
Title: <canvas>: The Graphics Canvas element
on GitHub

No new external URLs

---

URL: /en-US/docs/Web/CSS
Title: CSS: Cascading Style Sheets
on GitHub

No new external URLs