Bump sass from 1.63.6 to 1.64.0 in /client

Bumps [sass](https://github.com/sass/dart-sass) from 1.63.6 to 1.64.0.
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sass/dart-sass/compare/1.63.6...1.64.0)

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

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

client/package.json

@@ -19,7 +19,7 @@
     "react-dom": "^18.2.0",
     "react-router-dom": "^6.14.1",
     "react-transition-group": "^4.4.5",
-    "sass": "^1.63.6",
+    "sass": "^1.64.0",
     "socket.io-client": "^4.7.1",
     "uuid": "^9.0.0",
     "xterm": "^5.2.1",