chore(deps): update gatsby monorepo

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
babel-preset-gatsby	devDependencies	patch	0.5.15 -> 0.5.16
gatsby (changelog)	dependencies	minor	2.24.92 -> 2.25.3
gatsby-plugin-sharp	dependencies	patch	2.7.0 -> 2.7.1
gatsby-remark-images	dependencies	patch	3.4.0 -> 3.4.1
gatsby-source-contentful	dependencies	patch	3.1.0 -> 3.1.3
gatsby-source-filesystem	dependencies	patch	2.4.0 -> 2.4.2
gatsby-transformer-remark	dependencies	patch	2.9.0 -> 2.9.2

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Release Notes

gatsbyjs/gatsby

### [`v0.5.16`](https://togithub.com/gatsbyjs/gatsby/compare/5fbfaa81260fabc88aa920b04f3d51ea568323d0...077b67fa366eb5c5e0171e87eec8c8810d44c0d5) [Compare Source](https://togithub.com/gatsbyjs/gatsby/compare/5fbfaa81260fabc88aa920b04f3d51ea568323d0...077b67fa366eb5c5e0171e87eec8c8810d44c0d5)

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