Update zh-cn (#2576)

* Update zh-cn
* Update ui-text.yml

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Fix link for author name (#2575)

Missed from f68b54e53f9973047d80c1d4fc418f89f6a8689c

Change tab indent to space for consistency (#2614)

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Fix config comment to list all analytics providers. (#2607)

The main config was properly updated with the google-gtag
feature commit (0ff9dcc8936b3a438f9125d34e635b8b54ee280a), but was
removed, possibly by bad merge, with an unrelated commit
(53f0c03c7969e83bb53bf9fd64499c711c4029ed) two days later.

The docs and test configs appear to have never received the initial
google-gtag update.

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Give H4 in notice some space from below (#2602)

Enhance Bilibili video support (redo of #2522) (#2599)

* Enhance support for bilibili videos in responsive video helper, and add corresponding doc

* Apply @iBug's review in mmistakes/minimal-mistakes#2522

* Fix danmaku in page hero video

* Update video to use case..when for iframe src

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Co-authored-by: Anran <51769728+ALeafWolf@users.noreply.github.com>
Co-authored-by: Michael Rose <mmistakes@users.noreply.github.com>

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Algolia search update (#2572)

* Search on menu toggle

With that change search is performed when requested. Before it was done
for each pageview, regardless of the fact if search was used by user or
not.

* Localize algolia's empty template

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Updating link to wtfpl license (#2571)

The current wtpl license in the README is dead, so I'm updating it to use the current. The site doesn't have https, so if you want https we could also use https://choosealicense.com/licenses/wtfpl/.

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Do not include in toc (#2558)

Load Font Awesome CSS from jsDelivr CDN (#2583)

* Load Font Awesome CSS from jsDelivr CDN
* Update CHANGELOG and history

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Release 4.19.3 💎

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