The favicon shows in the Google search result page is skewed

[likidu]

Describe the bug
The favicon shows in the Google search result page should not be skewed.

In the HTML header we probably are not using the standard attribute for the icon, or missing the line here:

<link data-rh="true" rel="shortcut icon" href="/static/824a316591aa77b6ed2559aa3d5a613b/favicon.ico" type="image/x-icon">

Per Google's guide: https://developers.google.com/search/docs/appearance/favicon-in-search?hl=en&visit_id=638629747645764617-1384079662&rd=1

Screenshots

Desktop (please complete the following information):
Lastest Chrome desktop

[shhdgit]

Related pr: #542

updated. we might need some time to wait for the search engine to update its indexing, which took a week on the website(www.pingcap.com).