Bump gatsby-plugin-sass from 4.13.0 to 4.14.0

Bumps [gatsby-plugin-sass](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-sass) from 4.13.0 to 4.14.0.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-sass/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-plugin-sass@4.14.0/packages/gatsby-plugin-sass)

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

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

package.json

@@ -14,7 +14,7 @@
     "gatsby-plugin-manifest": "^3.14.0",
     "gatsby-plugin-react-helmet": "^4.14.0",
     "gatsby-plugin-robots-txt": "^1.6.10",
-    "gatsby-plugin-sass": "^4.13.0",
+    "gatsby-plugin-sass": "^4.14.0",
     "gatsby-source-filesystem": "^3.14.0",
     "prop-types": "^15.7.2",
     "react": "^17.0.2",