Update dependency markdown-to-jsx to v9

Author: renovate[bot]

package-lock.json

@@ -14,7 +14,7 @@
         "dayjs": "^1.11.11",
         "front-matter": "^4.0.2",
         "glob": "^10.4.2",
-        "markdown-to-jsx": "^7.7.3",
+        "markdown-to-jsx": "^9.0.0",
         "marked": "^14.1.2",
         "next": "15.5.12",
         "react": "^19.1.0",