fix: #72 replace SITE.website with a URL in astro.config site value

Using SITE.website in astro.config.mjs causes the problem . Thus, change back to the original url string in site value of .

Closes: #72

src/content/blog/how-to-configure-astropaper-theme.md

@@ -35,6 +35,17 @@ export const SITE = {
 };
 ```
 
+Then, replace site property of `astro.config.mjs` file with your own deployed domain. _(You can also omit this step if you don't have deployed domain yet or you are still in development mode)_
+
+```js
+// file: astro.config.mjs
+export default defineConfig({
+  site: "https://astro-paper.pages.dev/", // replace this with your deployed domain
+  integrations: [...],
+  ...
+)}
+```
+
 Here are SITE configuration options
 
 | Options            | Description                                                                                                                                                  |