Add security and privacy concerns for `spellcheck` attribute

[timogasda]

Description

This change adds a short section about privacy and security concerns to the spellcheck attribute page.

Motivation

Recently the security firm "otto-js" released an article about "spell-jacking", which showcases how some enhanced spellchecking features in Chrome and Windows send the content of your text fields to Google and Microsoft, respectively (https://www.otto-js.com/news/article/chrome-and-edge-enhanced-spellcheck-features-expose-pii-even-your-passwords). This raises some privacy concerns, especially for fields that contain sensitive information and/or PII.

Additional details

This is my first contribution to this repository, so I took inspiration from similar sections of the <a> and <img> element pages.

Related issues and pull requests

[github-actions[bot]]

Preview URLs

• /en-US/docs/Web/HTML/Global_attributes/spellcheck

External URLs (1)

URL: /en-US/docs/Web/HTML/Global_attributes/spellcheck Title: spellcheck

• https://www.otto-js.com/news/article/chrome-and-edge-enhanced-spellcheck-features-expose-pii-even-your-passwords (1 time) (Note! This may be a new URL 👀)

(this comment was updated 2022-11-10 16:31:20.082775)