Bump sass from 1.26.2 to 1.26.7 in /client

Bumps [sass](https://github.com/sass/dart-sass) from 1.26.2 to 1.26.7.
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/master/CHANGELOG.md)
- [Commits](sass/dart-sass@1.26.2...1.26.7)

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

Author: dependabot-preview[bot]

client/package-lock.json

@@ -32,7 +32,7 @@
     "eslint-plugin-import": "^2.20.1",
     "eslint-plugin-vue": "^6.2.1",
     "material-design-icons-iconfont": "^5.0.1",
-    "sass": "^1.26.2",
+    "sass": "^1.26.7",
     "sass-loader": "^7.3.1",
     "vue-cli-plugin-vuetify": "^2.0.5",
     "vue-template-compiler": "^2.6.11",