dep:#64 updated frontend packages and fixed changes

frontend/vite.config.ts

@@ -20,9 +20,9 @@ import { fileURLToPath } from "node:url";
 import resolve from "@rollup/plugin-node-resolve";
 import { resolve as pathResolver } from "path";
 import terser from "@rollup/plugin-terser";
-import ViteSSGOptions from "vite-ssg";
 import generateSitemap from "vite-ssg-sitemap";
 import vueDevTools from "vite-plugin-vue-devtools";
+import { ViteSSGOptions } from "vite-ssg";
 
 const hostname = "https://cal.htwk-leipzig.de";
 
@@ -45,7 +45,7 @@ export default defineConfig({
       ".scss",
     ],
   },
-  ssgOptions: {
+  ssgOptions: <ViteSSGOptions>{
     script: "async",
     formatting: "minify",
     format: "esm",