Bump gatsby-plugin-nprogress from 3.6.0 to 3.8.0

Bumps [gatsby-plugin-nprogress](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-nprogress) from 3.6.0 to 3.8.0.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-nprogress/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-plugin-nprogress@3.8.0/packages/gatsby-plugin-nprogress)

---
updated-dependencies:
- dependency-name: gatsby-plugin-nprogress
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package.json

@@ -115,7 +115,7 @@
     "gatsby": "^3.8.1",
     "gatsby-cli": "^3.6.0",
     "gatsby-plugin-algolia": "^0.20.1",
-    "gatsby-plugin-nprogress": "^3.6.0",
+    "gatsby-plugin-nprogress": "^3.8.0",
     "gatsby-source-custom-api": "^2.1.4",
     "gatsby-source-filesystem": "^3.8.0",
     "husky": "^4.3.7",