Fix type annotation for DuckDuckGoTool with latest version of ddgs package (#3330)

Co-authored-by: Douwe Maan <douwe@pydantic.dev>

Author: jhammarstedt

pydantic_ai_slim/pydantic_ai/common_tools/duckduckgo.py

@@ -10,7 +10,7 @@
 
 try:
     try:
-        from ddgs import DDGS
+        from ddgs.ddgs import DDGS
     except ImportError:  # Fallback for older versions of ddgs
         from duckduckgo_search import DDGS
 except ImportError as _import_error: