🐛 fix(websearch_bing): adjust pagination parameters

- change offset parameter to 'first' for correct page indexing
- ensure proper pagination logic with offset + 1 calculation

Author: Oaklight

src/toolregistry/hub/websearch/websearch_bing.py

@@ -137,7 +137,7 @@ def _meta_search_bing(
                     params={
                         "q": query,
                         "count": min(10, num_results - fetched_results),
-                        "offset": offset,
+                        "first": offset + 1,
                         "FORM": "PERE",
                     },
                     cookies={