Bump gatsby-plugin-sharp from 2.6.19 to 4.25.1

Bumps [gatsby-plugin-sharp](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-sharp) from 2.6.19 to 4.25.1.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-sharp/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-plugin-sharp@4.25.1/packages/gatsby-plugin-sharp)

---
updated-dependencies:
- dependency-name: gatsby-plugin-sharp
  dependency-type: direct:production
...

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

Author: dependabot[bot]

package.json

@@ -16,7 +16,7 @@
     "gatsby-plugin-react-helmet": "^3.3.10",
     "gatsby-plugin-robots-txt": "^1.5.1",
     "gatsby-plugin-sass": "^2.3.12",
-    "gatsby-plugin-sharp": "^2.6.19",
+    "gatsby-plugin-sharp": "^4.25.1",
     "gatsby-plugin-sitemap": "^2.4.11",
     "gatsby-source-filesystem": "^2.3.20",
     "gatsby-transformer-json": "^2.4.11",