Bump sass from 1.77.4 to 1.77.6 in /web/app

Bumps [sass](https://github.com/sass/dart-sass) from 1.77.4 to 1.77.6.
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/main/CHANGELOG.md)
- [Commits](sass/dart-sass@1.77.4...1.77.6)

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

Signed-off-by: dependabot[bot] <[email protected]>

web/app/package.json

@@ -23,7 +23,7 @@
     "rollup-plugin-css-only": "^4.5.2",
     "rollup-plugin-scss": "^4.0.0",
     "rollup-plugin-terser": "^7.0.0",
-    "sass": "^1.77.4"
+    "sass": "^1.77.6"
   },
   "dependencies": {
     "@fontsource/atkinson-hyperlegible": "^5.0.20",

web/app/yarn.lock

@@ -2169,10 +2169,10 @@ safe-regex-test@^1.0.0:
     get-intrinsic "^1.1.3"
     is-regex "^1.1.4"
 
-sass@^1.77.4:
-  version "1.77.4"
-  resolved "https://registry.yarnpkg.com/sass/-/sass-1.77.4.tgz#92059c7bfc56b827c56eb116778d157ec017a5cd"
-  integrity sha512-vcF3Ckow6g939GMA4PeU7b2K/9FALXk2KF9J87txdHzXbUF9XRQRwSxcAs/fGaTnJeBFd7UoV22j3lzMLdM0Pw==
+sass@^1.77.6:
+  version "1.77.6"
+  resolved "https://registry.yarnpkg.com/sass/-/sass-1.77.6.tgz#898845c1348078c2e6d1b64f9ee06b3f8bd489e4"
+  integrity sha512-ByXE1oLD79GVq9Ht1PeHWCPMPB8XHpBuz1r85oByKHjZY6qV6rWnQovQzXJXuQ/XyE1Oj3iPk3lo28uzaRA2/Q==
   dependencies:
     chokidar ">=3.0.0 <4.0.0"
     immutable "^4.0.0"