Fix markdown table not rendering issue

- markdown table rendering is broken because of using `rehypePlugins` in astro config.
  This is due to the fact that enabling custom `remarkPlugins` or `rehypePlugins` will remove `remark-gfm`, `remark-smartypants` which are built-in plugins and we need to explicitly add these plugins.
- added `remark-gfm` and `remark-smartypants` to fix this

astro.config.mjs

@@ -10,6 +10,7 @@ export default defineConfig({
     shikiConfig: {
       theme: 'nord',
     },
+    remarkPlugins: ['remark-gfm', 'remark-smartypants'],
     rehypePlugins: [
       [
         'rehype-external-links',