Refactor codeowners (#1834)

* Update CODEOWNERS
Signed-off-by: Njinhai <hai.jin@zilliz.com>

* Update CODEOWNERS
Signed-off-by: Njinhai <hai.jin@zilliz.com>

* Update CODEOWNERS
Signed-off-by: Njinhai <hai.jin@zilliz.com>

CODEOWNERS

 # Each line is a component followed by one or more owners. 
 
-* @JinHai-CN
-/core   @JinHai-CN @XuPeng-SH
-/ci     @ZhifengZhang-CN
-/docker @ZhifengZhang-CN
-/docs   @jielinxu @yamasite
-/sdk    @fishpenguin
-/shards @XuPeng-SH
-/tests  @del-zhenwu
\ No newline at end of file
+*                        @JinHai-CN
+/sdk                     @scsven
+/shards                  @XuPeng-SH
+/core/                   @scsven
+/core/src/db/meta        @yhmo
+/core/src/index/knowhere @cydrain
+/core/src/index/         @shengjun1985
\ No newline at end of file