i18n(fr): reword the Adapter API page title (#9746)

The previous translation was a bit strange.

Co-authored-by: Yan <[email protected]>

src/content/docs/fr/reference/adapter-reference.mdx

@@ -1,5 +1,5 @@
 ---
-title: Adaptateur l'API de Astro
+title: API de l'Adaptateur d'Astro
 i18nReady: true
 ---
 import Since from '~/components/Since.astro';