Update dependency gatsby to v2.21.37

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
gatsby (changelog)	dependencies	patch	2.21.33 -> 2.21.37

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Release Notes

gatsbyjs/gatsby

### [`v2.21.37`](https://togithub.com/gatsbyjs/gatsby/compare/gatsby@2.21.36...gatsby@2.21.37) [Compare Source](https://togithub.com/gatsbyjs/gatsby/compare/gatsby@2.21.36...gatsby@2.21.37) ### [`v2.21.36`](https://togithub.com/gatsbyjs/gatsby/compare/gatsby@2.21.35...gatsby@2.21.36) [Compare Source](https://togithub.com/gatsbyjs/gatsby/compare/gatsby@2.21.35...gatsby@2.21.36) ### [`v2.21.35`](https://togithub.com/gatsbyjs/gatsby/compare/gatsby@2.21.34...gatsby@2.21.35) [Compare Source](https://togithub.com/gatsbyjs/gatsby/compare/gatsby@2.21.34...gatsby@2.21.35) ### [`v2.21.34`](https://togithub.com/gatsbyjs/gatsby/compare/gatsby@2.21.33...gatsby@2.21.34) [Compare Source](https://togithub.com/gatsbyjs/gatsby/compare/gatsby@2.21.33...gatsby@2.21.34)

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