chore(deps): update dependency svelte to v4

Author: renovate[bot]

package.json

@@ -33,7 +33,7 @@
     "rehype-katex-svelte": "^1.2.0",
     "remark-gfm": "^4.0.0",
     "remark-math": "^2.0.1",
-    "svelte": "^3.59.2",
+    "svelte": "^4.0.0",
     "svelte-check": "^3.4.6",
     "svelte-preprocess": "^5.0.4",
     "tslib": "^2.6.0",