Fixes anchor tags for NPM

[schalkventer]

<a src="#*"> are not supported on NPM, it might be better to just use the automatically generated anchor IDs since this means the table of contents will work on both Github and NPM

For example https://www.npmjs.com/package/microbundle#formats does not work, but https://www.npmjs.com/package/microbundle#-output-formats- works.

[changeset-bot[bot]]

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Latest commit: 561ac84e9b93c1478a4a66ede70fa1f43c311d32

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