!20573 update the regular expression from '*' to '.*'

Merge pull request !20573 from chengbin/code_docs_owners

mindspore/ccsrc/utils/context/OWNERS

@@ -1,5 +1,5 @@
 files:
-  "*graph_kernel*":
+  ".*graph_kernel.*":
     approvers:
     - gaoxiong1
     - ckey_dou