misc: update code owner (#4993)

Approved by: @fengttt

CODEOWNERS

@@ -11,7 +11,7 @@
 # files under the top level directory
 /*.yml @sukki37
 /*.yaml @sukki37
-/Makefile @lni
+/Makefile @zhangxu19830126
 /README.md @dengn
 /README_CN.md @dengn
 /LICENSE @fengttt
@@ -30,7 +30,7 @@
 # cmd
 /cmd/db-server @daviszhen
 /cmd/generate-config @daviszhen
-/cmd/mo-service @zhangxu19830126 @lni
+/cmd/mo-service @zhangxu19830126
 
 # pkg itself
 /pkg @fengttt
@@ -51,12 +51,13 @@
 /pkg/container @nnsgmsone
 /pkg/defines @daviszhen
 /pkg/dnservice @zhangxu19830126
+/pkg/taskservice @zhangxu19830126
 /pkg/encoding @nnsgmsone
 /pkg/errno @nnsgmsone
 /pkg/fileservice @reusee
 /pkg/frontend @daviszhen
-/pkg/hakeeper @lni
-/pkg/logservice @lni
+/pkg/hakeeper @zhangxu19830126 @w-zr
+/pkg/logservice @zhangxu19830126
 /pkg/logutil @daviszhen
 /pkg/partition @nnsgmsone
 /pkg/sort @nnsgmsone
@@ -66,7 +67,7 @@
 /pkg/sql/plan @ouyuanning @aunjgr
 /pkg/tests/service @zhangxu19830126 @cnutshell
 /pkg/testutil @nnsgmsone
-/pkg/txn @zhangxu19830126 @lni
+/pkg/txn @zhangxu19830126
 /pkg/vectorize @aunjgr
 /pkg/util/internalExecutor @aptend
 /pkg/util/metric @aptend
@@ -74,22 +75,22 @@
 
 # /proto contains pb definitions, owners will be responsible
 # for compatibility issues required for rolling upgrade.
-/proto/logservice.proto @lni
-/proto/metadata.proto @lni
+/proto/logservice.proto @zhangxu19830126
+/proto/metadata.proto @zhangxu19830126
 /proto/metric.proto @aptend
 /proto/pipeline.proto @nnsgmsone
 /proto/plan.proto @fengttt @nnsgmsone
-/proto/timestamp.proto @lni
+/proto/timestamp.proto @zhangxu19830126
 /proto/txn.proto @zhangxu19830126
 
 # folders under pkg/pb contain code generated by pb, owners will be responsible
 # for compatibility issues required for rolling upgrade. 
-/pkg/pb/logservice @lni
-/pkg/pb/metadata @lni
+/pkg/pb/logservice @zhangxu19830126
+/pkg/pb/metadata @zhangxu19830126
 /pkg/pb/metric @aptend
 /pkg/pb/pipeline @nnsgmsone
 /pkg/pb/plan @fengttt @nnsgmsone
-/pkg/pb/timestamp @lni
+/pkg/pb/timestamp @zhangxu19830126
 /pkg/pb/txn @zhangxu19830126 
 
 # engines and engine related stuff