fix: upgrade multiple dependencies with Snyk

Snyk has created this PR to upgrade:
  - gatsby from 2.24.91 to 2.32.4.
    See this package in npm: https://www.npmjs.com/package/gatsby
  - gatsby-image from 2.4.5 to 2.11.0.
    See this package in npm: https://www.npmjs.com/package/gatsby-image
  - gatsby-plugin-manifest from 2.8.0 to 2.12.0.
    See this package in npm: https://www.npmjs.com/package/gatsby-plugin-manifest
  - gatsby-plugin-offline from 3.2.7 to 3.10.1.
    See this package in npm: https://www.npmjs.com/package/gatsby-plugin-offline
  - gatsby-plugin-sass from 2.3.2 to 2.8.0.
    See this package in npm: https://www.npmjs.com/package/gatsby-plugin-sass
  - gatsby-plugin-sharp from 2.10.1 to 2.14.1.
    See this package in npm: https://www.npmjs.com/package/gatsby-plugin-sharp
  - gatsby-remark-copy-linked-files from 2.3.3 to 2.10.0.
    See this package in npm: https://www.npmjs.com/package/gatsby-remark-copy-linked-files
  - gatsby-remark-images from 3.3.8 to 3.11.0.
    See this package in npm: https://www.npmjs.com/package/gatsby-remark-images
  - gatsby-source-filesystem from 2.3.8 to 2.11.0.
    See this package in npm: https://www.npmjs.com/package/gatsby-source-filesystem
  - gatsby-transformer-json from 2.4.3 to 2.11.0.
    See this package in npm: https://www.npmjs.com/package/gatsby-transformer-json

See this project in Snyk:
https://app.snyk.io/org/github-newrelic/project/f888c3c2-125f-4ff7-a0c6-0181b3c27c8b?utm_source=github&utm_medium=upgrade-pr

Author: snyk-bot