[Docs] Fix code syntax highlighting

[nbsp1221]

I fixed the issue with code syntax highlighting that caused a red background line to appear.

Before

After

[ljharb]

These are meant to be json, though, not js

[nbsp1221]

These are meant to be json, though, not js

Yes, you're right. It's just a trick.

The original format is JSON, but there were syntax elements such as ..., <enabled>, which are not compatible with JSON and caused the highlighting to break. Therefor, like other examples, I used js.

eslint-plugin-react/docs/rules/boolean-prop-naming.md

Lines 51 to 60 in 4a92667

	```js
	...
	"react/boolean-prop-naming": [<enabled>, {
	"propTypeNames": Array<string>,
	"rule": <string>,
	"message": <string>,
	"validateNested": <boolean>
	}]
	...
	```

[nbsp1221]

@ljharb

I found json5. It seems that by using it, I can fix code syntax highlighting while retaining the fact these are meant to be JSON.

[codecov]

Codecov Report

Merging #3563 (13f5c19) into master (f2d8d26) will not change coverage.
The diff coverage is n/a.

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##           master    #3563   +/-   ##
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  Coverage   97.62%   97.62%           
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  Files         132      132           
  Lines        9295     9295           
  Branches     3400     3400           
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  Hits         9074     9074           
  Misses        221      221