Bump sass-loader from 13.3.0 to 13.3.1

Bumps [sass-loader](https://github.com/webpack-contrib/sass-loader) from 13.3.0 to 13.3.1.
- [Release notes](https://github.com/webpack-contrib/sass-loader/releases)
- [Changelog](https://github.com/webpack-contrib/sass-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/sass-loader/compare/v13.3.0...v13.3.1)

---
updated-dependencies:
- dependency-name: sass-loader
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

package.json

@@ -38,7 +38,7 @@
     "propagating-hammerjs": "^2.0.1",
     "rails-erb-loader": "usabilityhub/rails-erb-loader#master",
     "sass": "^1.62.1",
-    "sass-loader": "^13.3.0",
+    "sass-loader": "^13.3.1",
     "shakapacker": "6.6.0",
     "sortablejs": "^1.15.0",
     "sorttable": "^1.0.2",