[fix] bing engines - geoblocking in China (#6134)

In regions like China, the domain must be adjusted to avoid a redirect.

- https://github.com/searxng/searxng/issues/5243
- https://github.com/searxng/searxng/pull/5324
- https://github.com/searxng/searxng/pull/6133

Suggested / tested by @hubutui in https://github.com/searxng/searxng/pull/6133#issuecomment-4534637069

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/engines/bing_news.py

@@ -44,7 +44,7 @@ time_map = {
 difference of *last day* and *last week* in the result list is just marginally.
 Bing does not have news range ``year`` / we use ``month`` instead."""
 
-base_url = "https://www.bing.com/news/infinitescrollajax"
+base_url = "https://www.bing.com"
 """Bing (News) search URL"""
 
 
@@ -74,9 +74,7 @@ def request(query, params):
     if params["time_range"]:
         query_params["qft"] = time_map.get(params["time_range"], 'interval="9"')
 
-    params["url"] = base_url + "?" + urlencode(query_params)
-
-    return params
+    params["url"] = base_url + "/news/infinitescrollajax?" + urlencode(query_params)
 
 
 def response(resp):