docs: update global site name, delete @

Author: pheralb

website/app/globals.ts

@@ -1,4 +1,4 @@
-export const siteTitle = '@pheralb/toast';
+export const siteTitle = 'pheralb/toast';
 export const eslogan = 'An accessible and beautiful toast library for React';
 export const siteUrl = 'https://toast.pheralb.dev';
 export const siteUrlImages = `${siteUrl}/images`;