chore(deps): update dependency remark-mdx to v3

Author: renovate[bot]

packages/blog-sync/package.json

@@ -14,7 +14,7 @@
     "guild-devto-nodejs-sdk": "1.0.6",
     "js-yaml": "4.1.0",
     "remark-frontmatter": "5.0.0",
-    "remark-mdx": "2.3.0",
+    "remark-mdx": "3.1.0",
     "remark-parse": "10.0.2",
     "remark-parse-frontmatter": "1.0.3",
     "remark-stringify": "10.0.3",