build(deps-dev): bump gatsby-plugin-sass from 4.0.2 to 4.1.0

Bumps [gatsby-plugin-sass](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-sass) from 4.0.2 to 4.1.0.
- [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@4.1.0/packages/gatsby-plugin-sass)

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

package.json

@@ -75,7 +75,7 @@
     "gatsby-plugin-page-creator": "3.1.0",
     "gatsby-plugin-react-helmet": "4.0.0",
     "gatsby-plugin-react-svg": "3.0.0",
-    "gatsby-plugin-sass": "4.0.2",
+    "gatsby-plugin-sass": "4.1.0",
     "gatsby-source-filesystem": "3.0.0",
     "gatsby-transformer-react-docgen": "6.1.0",
     "glob": "7.1.6",