Update dependency svelte to v4.2.20

Author: renovate[bot]

frontend/package-lock.json

@@ -14,7 +14,7 @@
     "@fortawesome/free-solid-svg-icons": "6.5.2",
     "@sveltejs/vite-plugin-svelte": "3.1.1",
     "@tsconfig/svelte": "5.0.4",
-    "svelte": "4.2.18",
+    "svelte": "4.2.20",
     "svelte-check": "3.8.1",
     "svelte-fa": "4.0.2",
     "svelte-preprocess": "6.0.1",