Bump gatsby-plugin-sass from 6.14.0 to 6.15.0 in /website (#311)

Bumps [gatsby-plugin-sass](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-sass) from 6.14.0 to 6.15.0.
- [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/[email protected]/packages/gatsby-plugin-sass)

---
updated-dependencies:
- dependency-name: gatsby-plugin-sass
  dependency-version: 6.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

website/package.json

@@ -26,7 +26,7 @@
     "gatsby-plugin-image": "^3.14.0",
     "gatsby-plugin-manifest": "^5.14.0",
     "gatsby-plugin-react-helmet": "^6.14.0",
-    "gatsby-plugin-sass": "^6.14.0",
+    "gatsby-plugin-sass": "^6.15.0",
     "gatsby-plugin-sharp": "^5.14.0",
     "gatsby-plugin-sitemap": "^6.14.0",
     "gatsby-source-filesystem": "^5.14.0",

website/yarn.lock

@@ -5689,10 +5689,10 @@ gatsby-plugin-react-helmet@^6.14.0:
   dependencies:
     "@babel/runtime" "^7.20.13"
 
-gatsby-plugin-sass@^6.14.0:
-  version "6.14.0"
-  resolved "https://registry.yarnpkg.com/gatsby-plugin-sass/-/gatsby-plugin-sass-6.14.0.tgz#2814162418e6942e09413e324f6ce91c78ff06dd"
-  integrity sha512-3AirLeSpzGGqKDZNAGB33nfPXzPuQ6hGv3bYKhEeWMTapDAdaiF2BKLDSgcX+Dx30m2x8ZMlrDH3Krvsl5I5Vw==
+gatsby-plugin-sass@^6.15.0:
+  version "6.15.0"
+  resolved "https://registry.yarnpkg.com/gatsby-plugin-sass/-/gatsby-plugin-sass-6.15.0.tgz#9d0df2ab28b3f0c88c06381d554535212c69e7dc"
+  integrity sha512-F2oHwcSKK9yg5wjo3cQzRa0jQkxyU3/3Tei8eMaz49/UXuhkRQ0y0uBegcyPeqBe4anOZQVdtRENeK0VSfkWFw==
   dependencies:
     "@babel/runtime" "^7.20.13"
     resolve-url-loader "^3.1.5"