feat(githubCorner): add width and height attributes

[dpschen]

Summary

Add width and height attribute. This fixes jumping of the SVG for loading for slow connections.

Here is a video showing this behavior for the zod documentation:

https://user-images.githubusercontent.com/6173598/219676739-646d201a-313c-4f8f-8c2e-7983a7c71445.mp4

This adds width and height attributes to the github corner svg so that the intrinsic size is defined. See also https://web.dev/optimize-cls/#modern-best-practice. This does not prevent overwriting the size via CSS later so it shouldn't break any user CSS.

What kind of change does this PR introduce?

Bugfix

For any code change,

• [x] Related documentation has been updated if needed
• [ ] Related tests have been updated or tests have been added

Does this PR introduce a breaking change? (check one)

• [ ] Yes
• [x] No

If yes, please describe the impact and migration path for existing applications:

Related issue, if any:

Tested in the following browsers:

• [x] Chrome
• [ ] Firefox
• [ ] Safari
• [ ] Edge
• [ ] IE

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Name	Status	Preview	Comments	Updated (UTC)
docsify-preview	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 9, 2023 9:13pm

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[trusktr]

Tests are not running for some reason.

[trusktr]

Changing bases to main and back to develop fixed it (same issue I've had in other projects, changing base always works).

[trusktr]

This will conflict with

• https://github.com/docsifyjs/docsify/pull/2106

We'll merge that one first.