fix: pageNumber and dynamic await

i18n/locales/fr.json

···
         "next": "Suivant",
         "nextAriaLabel": "Page suivante",
         "defaultLabel": "Pagination",
-        "pageLabel": "Aller à la page {pagenumber}"
+        "pageLabel": "Aller à la page {pageNumber}"
       },
       "sidebar": {
         "title": "Changer de page"

next.dynamic.mjs

···
 
       // We then attempt to retrieve the source version of the file as there is no localised version
       // of the file and we set it on the cache to prevent future checks of the same locale for this file
-      const { source: fileContent } = _getMarkdownFile(
+      const { source: fileContent } = await _getMarkdownFile(
         defaultLocale.code,
         pathname
       );