Update dependency sass to v1.55.0

Author: renovate[bot]

frontend/package.json

@@ -21,7 +21,7 @@
     "@vue/cli-plugin-vuex": "4.5.13",
     "@vue/cli-service": "5.0.1",
     "@vue/compiler-sfc": "3.1.1",
-    "sass": "1.34.1",
+    "sass": "1.55.0",
     "sass-loader": "8.0.2"
   }
 }