Update statdown to cebe5e27 (front matter preservation fix)

statdown now inserts CSS/JS dependency tags after the YAML front
matter closing delimiter instead of before it, fixing Hugo's
inability to parse the front matter in rendered widget posts.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

renv.lock

@@ -3331,7 +3331,7 @@
       "RemoteUsername": "andrewjstryker",
       "RemoteRepo": "statdown",
       "RemoteRef": "main",
-      "RemoteSha": "b7b7c134b890e1acf1b92ff9418b717125fe1a9b",
+      "RemoteSha": "cebe5e27eabf126c2c5e0005d2fcbcc5cf7d8961",
       "Remotes": "andrewjstryker/depkit"
     },
     "stringi": {