⬆️ Bump gatsby-plugin-netlify from 3.0.1 to 3.1.0

Bumps [gatsby-plugin-netlify](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-netlify) from 3.0.1 to 3.1.0.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-netlify/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-plugin-netlify@3.1.0/packages/gatsby-plugin-netlify)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -14,13 +14,13 @@
  "gatsby-plugin-image": "^1.0.1",
  "gatsby-plugin-intl": "^0.3.3",
  "gatsby-plugin-manifest": "^3.0.0",
- "gatsby-plugin-netlify": "^3.0.1",
+ "gatsby-plugin-netlify": "^3.1.0",
  "gatsby-plugin-offline": "^4.0.0",
  "gatsby-plugin-react-helmet": "^4.0.0",
  "gatsby-plugin-sass": "^4.0.2",
  "gatsby-plugin-sharp": "^3.0.1",
  "gatsby-plugin-sitemap": "^3.0.0",
- "gatsby-source-contentful": "^5.0.3",
+ "gatsby-source-contentful": "^5.1.0",
  "gatsby-source-filesystem": "^3.0.0",
  "gatsby-transformer-sharp": "^3.0.0",
  "react": "^17.0.1",