Several updates (#2587)

* acfun: add more domains

* microsoft: add msidentity.com

* category-ai-cn: remove redundant entry

The dedicated deepseek file has been included, so this one is redundant.

* catefory-education-cn: add more domains

data/microsoft

@@ -207,6 +207,7 @@ msftncsi.com
 msftnet.org
 msgamesresearch.com
 mshome.net
+msidentity.com
 msocdn.com
 mspil.cn @cn
 msra.cn @cn