add headers to mp gh request

rsshub/spiders/mp/gh.py

@@ -1,4 +1,5 @@
 from rsshub.utils import fetch
+from rsshub.utils import DEFAULT_HEADERS
 
 domain = 'https://weixin.sogou.com'
 
@@ -16,8 +17,8 @@ def parse(post):
 
 def ctx(gh=''):
     global url 
-    url = f"{domain}/weixin?query={gh}"
-    tree = fetch(url)
+    url = f"{domain}/weixin?type=1&s_from=input&query={gh}&ie=utf8&_sug_=n&_sug_type_=&w=01019900&sut=1554&sst0=1628603087755&lkt=0%2C0%2C0"
+    tree = fetch(url=url, headers=DEFAULT_HEADERS)
     global dd_num
     dd_num = len( tree.css('dd') )
     posts = [ tree.css('dd')[-1] ]