build(deps): bump gatsby-plugin-image from 3.11.0 to 3.12.0

Bumps [gatsby-plugin-image](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-image) from 3.11.0 to 3.12.0.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-image/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-plugin-image@3.12.0/packages/gatsby-plugin-image)

---
updated-dependencies:
- dependency-name: gatsby-plugin-image
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -24,7 +24,7 @@
  "gatsby-plugin-feed": "^5.10.0",
  "gatsby-plugin-google-gtag": "^5.11.0",
  "gatsby-plugin-google-tagmanager": "^5.11.0",
- "gatsby-plugin-image": "^3.11.0",
+ "gatsby-plugin-image": "^3.12.0",
  "gatsby-plugin-local-search": "^2.0.1",
  "gatsby-plugin-manifest": "^5.11.0",
  "gatsby-plugin-mdx": "^5.10.0",