Fix capitalization of vitest plugin

Author: rijkvanzanten

vitest.config.ts

@@ -1,8 +1,8 @@
-import Vue from '@vitejs/plugin-vue';
+import vue from '@vitejs/plugin-vue';
 import { defineConfig } from 'vitest/config';
 
 export default defineConfig({
-	plugins: [Vue()],
+	plugins: [vue()],
 	test: {
 		environment: 'happy-dom',
 	},