Update backend address

snippets-frontend/lib/snippet-utils.ts

@@ -4,7 +4,7 @@ export function languageLabel(filename: string) {
 }
 
 export function rawSnippetUrl(id: string) {
-    return `http://127.0.0.1:6868/${encodeURIComponent(id)}?mode=raw`
+    return `https://snippets.rtast.cn/${encodeURIComponent(id)}?mode=raw`
 }
 
 export function snippetUrl(id: string) {