chore(deps): update dependency mdformat-gfm to v0.3.7

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mdformat-gfm	0.3.6 -> 0.3.7

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Release Notes

hukkin/mdformat-gfm (mdformat-gfm)

### [`v0.3.7`](https://redirect.github.com/hukkin/mdformat-gfm/compare/0.3.6...0.3.7) [Compare Source](https://redirect.github.com/hukkin/mdformat-gfm/compare/0.3.6...0.3.7)

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