Add an emoji for 'recommended-type-checked' about eslint-doc-generator

[bmish]

I'm open to this since this config name recommended-type-checked seems like a common or recommended convention for type-aware rules, as seen here: https://typescript-eslint.io/linting/typed-linting/

My original idea behind using ☑️ for it is that this black/white checkmark is a variation of the green checkmark ✅ used for recommended, the same way that recommended-type-checked is a variation/extension of the recommended config. There's also ✔️ but that is a bit less consistent with the styling.

There's also ⌨️ which could make sense as we're using it for other TypeScript-related configs, but it doesn't have the benefit that ☑️ does of implying a relation to the recommended config.

So it seems we can start with ☑️.