chore(deps): update dependency hast-util-to-string to v3

Author: renovate[bot]

packages/markdown/package.json

@@ -26,7 +26,7 @@
     "@types/node": "^20.0.0",
     "github-slugger": "^2.0.0",
     "hast-util-heading-rank": "^2.1.1",
-    "hast-util-to-string": "^2.0.0",
+    "hast-util-to-string": "^3.0.0",
     "micromark": "^4.0.0",
     "micromark-extension-directive": "^2.1.2",
     "micromark-extension-gfm": "^3.0.0",