i18n(ja): Update guides/migrate-to-astro/from-wordpress.mdx translation (#14623)

Author: awwa

src/content/docs/ja/guides/migrate-to-astro/from-wordpress.mdx

@@ -78,6 +78,7 @@ WordPress上のすべての投稿コンテンツを移行したい場合は、[W
   <LinkCard title="Why I ditched WordPress for Astro" href="https://vbartalis.xyz/en/blog/why-i-ditched-wordpress-for-astro-js/" />
   <LinkCard title="DeWP: utility to use your WordPress data in Astro projects" href="https://delucis.github.io/dewp/" />
   <LinkCard title="Astro vs. WordPress: Rendering Patterns of the Modern Web" href="https://andrewkepson.com/blog/headless-wordpress/astro-vs-wordpress-rendering-patterns/" />
+  <LinkCard title="Moving an 8-year-old WordPress site without losing a single URL" href="https://synapsereality.io/wordpress-site-migration-without-losing-a-url/" />
 </CardGrid>
 
 :::note[共有したいリソースがありますか？]