chore: update official watcher state

Author: official-watcher[bot]

.github/state/last_check.json

@@ -20,7 +20,7 @@
     "wshobson/agents",
     "x1xhlol/system-prompts-and-models-of-ai-tools"
   ],
-  "anthropic/official_docs": "ee51140df88e79ed",
+  "anthropic/official_docs": "3ff219a813aa8ee5",
   "competitor/openai_codex/releases": "rust-v0.144.6",
   "competitor/gemini/releases": "v0.52.0-nightly.20260719.gacae7124b",
   "community/hackernews/seen": [