build(deps): bump gatsby-transformer-sharp from 5.11.0 to 5.12.0 (#882)

Bumps [gatsby-transformer-sharp](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-transformer-sharp) from 5.11.0 to 5.12.0.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-transformer-sharp/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-transformer-sharp@5.12.0/packages/gatsby-transformer-sharp)

---
updated-dependencies:
- dependency-name: gatsby-transformer-sharp
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -44,7 +44,7 @@
  "gatsby-source-filesystem": "^5.12.0",
  "gatsby-transformer-asciidoc": "^4.12.0",
  "gatsby-transformer-remark": "^6.11.0",
- "gatsby-transformer-sharp": "^5.11.0",
+ "gatsby-transformer-sharp": "^5.12.0",
  "highlight.js": "^11.8.0",
  "html-to-text": "^9.0.5",
  "i18next": "^21.10.0",