Fix link to refer to mdn

[skyclouds2001]

Description

I think the link here should refer to https://github.com/mdn/dom-examples

Motivation

Additional details

Related issues and pull requests

[github-actions]

Preview URLs

• /en-US/docs/Web/API/DocumentPictureInPicture
• /en-US/docs/Web/API/Document_Picture-in-Picture_API

External URLs (2)

URL: /en-US/docs/Web/API/Document_Picture-in-Picture_API
Title: Document Picture-in-Picture API

• https://mdn.github.io/dom-examples/document-picture-in-picture/ (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Web/API/DocumentPictureInPicture
Title: DocumentPictureInPicture

• https://mdn.github.io/dom-examples/document-picture-in-picture/ (1 time) (Note! This may be a new URL 👀)

[wbamberg]

👍 nice, thank you @skyclouds2001 !