Update dependency @next/mdx to v15.5.4

Author: renovate[bot]

package.json

@@ -7,7 +7,7 @@
   "dependencies": {
     "@mdx-js/loader": "3.0.1",
     "@mdx-js/react": "3.0.1",
-    "@next/mdx": "15.0.4",
+    "@next/mdx": "15.5.4",
     "@radix-ui/colors": "2.1.0",
     "@vercel/analytics": "1.4.1",
     "fathom-client": "3.5.0",

yarn.lock

@@ -929,10 +929,10 @@
   dependencies:
     fast-glob "3.3.1"
 
-"@next/mdx@15.0.4":
-  version "15.0.4"
-  resolved "https://registry.yarnpkg.com/@next/mdx/-/mdx-15.0.4.tgz#236be98add9c4ea7b489d7d5904b0574824fd6bb"
-  integrity sha512-BeqbM0ShnGQGv0qNM1ac7t0TqerHzjYamhbfE62UDZ35U7dlsqaafeuGUw91kZJWdHBOja1kUgZn1I1xCZQNhQ==
+"@next/mdx@15.5.4":
+  version "15.5.4"
+  resolved "https://registry.yarnpkg.com/@next/mdx/-/mdx-15.5.4.tgz#b7e7da007a809aab03cbbb29a5fad7e773c7c917"
+  integrity sha512-QUc14KkswCau2/Lul13t13v8QYRiEh3aeyUMUix5mK/Zd8c/J9NQuVvLGhxS7fxGPU+fOcv0GaXqZshkvNaX7A==
   dependencies:
     source-map "^0.7.0"