Bump sass from 1.20.1 to 1.20.3 (#10941)

Bumps [sass](https://github.com/sass/dart-sass) from 1.20.1 to 1.20.3.
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sass/dart-sass/compare/1.20.1...1.20.3)

package.json

@@ -148,7 +148,7 @@
     "requestidlecallback": "^0.3.0",
     "reselect": "^4.0.0",
     "rimraf": "^2.6.3",
-    "sass": "^1.20.1",
+    "sass": "^1.20.3",
     "sass-loader": "^7.0.3",
     "stringz": "^1.0.0",
     "substring-trie": "^1.0.2",