fix(deps): update dependency @ai-sdk/anthropic to v3

Author: renovate[bot]

bun.lock

@@ -10,7 +10,7 @@
     "format": "ultracite format"
   },
   "dependencies": {
-    "@ai-sdk/anthropic": "^1.2.12",
+    "@ai-sdk/anthropic": "^3.0.0",
     "@ai-sdk/google": "^1.2.19",
     "@ai-sdk/groq": "^1.2.9",
     "@ai-sdk/openai": "^1.3.22",