Bump sass-loader from 14.2.1 to 15.0.0 in /client (#2645)

Bumps [sass-loader](https://github.com/webpack-contrib/sass-loader) from 14.2.1 to 15.0.0.
- [Release notes](https://github.com/webpack-contrib/sass-loader/releases)
- [Changelog](https://github.com/webpack-contrib/sass-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/sass-loader@v14.2.1...v15.0.0)

---
updated-dependencies:
- dependency-name: sass-loader
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

client/package.json

@@ -21,7 +21,7 @@
     "riot": "^9.2.2",
     "rxjs": "^7.8.1",
     "sass": "^1.77.8",
-    "sass-loader": "^14.2.1",
+    "sass-loader": "^15.0.0",
     "shufflejs": "v6.1.1",
     "style-loader": "^4.0.0",
     "webpack": "^5.93.0",

client/yarn.lock

@@ -2044,7 +2044,7 @@ __metadata:
     riot: "npm:^9.2.2"
     rxjs: "npm:^7.8.1"
     sass: "npm:^1.77.8"
-    sass-loader: "npm:^14.2.1"
+    sass-loader: "npm:^15.0.0"
     shufflejs: "npm:v6.1.1"
     style-loader: "npm:^4.0.0"
     webpack: "npm:^5.93.0"
@@ -3381,9 +3381,9 @@ __metadata:
   languageName: node
   linkType: hard
 
-"sass-loader@npm:^14.2.1":
-  version: 14.2.1
-  resolution: "sass-loader@npm:14.2.1"
+"sass-loader@npm:^15.0.0":
+  version: 15.0.0
+  resolution: "sass-loader@npm:15.0.0"
   dependencies:
     neo-async: "npm:^2.6.2"
   peerDependencies:
@@ -3403,7 +3403,7 @@ __metadata:
       optional: true
     webpack:
       optional: true
-  checksum: 10/9cb864fd8d4c4f73d05f6cedae9ff4500f15fa742385e1f1cffcc0f994270810288fe99009f233ac6516fdc497570ce21f53c63f079c70e841c1e5bf994bc27d
+  checksum: 10/f69d13bd8a76a3f427fda05057dae98a7cfd2cdb09a4c25421f447eba074a39ff1c02150ff5d5ac8f1005dbc465438d8339f356fb6c14721d00275fea7bf7c6b
   languageName: node
   linkType: hard