chore(deps): update dependency svelte to v4

Author: renovate[bot]

package.json

@@ -32,7 +32,7 @@
 		"rehype-katex-svelte": "^1.1.2",
 		"remark-gfm": "^3.0.1",
 		"remark-math": "^2.0.1",
-		"svelte": "^3.53.1",
+		"svelte": "^4.0.0",
 		"svelte-check": "^3.0.0",
 		"svelte-preprocess": "^5.0.0",
 		"tslib": "^2.4.1",