Update gatsby monorepo

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
gatsby	dependencies	patch	2.17.16 -> 2.17.17
gatsby-plugin-manifest	dependencies	patch	2.2.28 -> 2.2.29
gatsby-plugin-offline	dependencies	patch	3.0.21 -> 3.0.22
gatsby-plugin-sharp	dependencies	patch	2.3.1 -> 2.3.2
gatsby-source-filesystem	dependencies	patch	2.1.37 -> 2.1.38
gatsby-transformer-remark	dependencies	patch	2.6.36 -> 2.6.37

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Release Notes

gatsbyjs/gatsby

### [`v2.17.17`](https://togithub.com/gatsbyjs/gatsby/compare/gatsby@2.17.16...gatsby@2.17.17) [Compare Source](https://togithub.com/gatsbyjs/gatsby/compare/gatsby@2.17.16...gatsby@2.17.17)

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[codecov[bot]]

Codecov Report

Merging #357 into master will not change coverage. The diff coverage is n/a.

@@          Coverage Diff          @@
##           master   #357   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           5      5           
  Lines          60     60           
  Branches       10     10           
=====================================
  Hits           60     60

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