[ci] chore: add codeowner (volcengine#3473)

### What does this PR do?

add codeowner in npu folder
/recipe/dapo and /examples/grpo_trainer: model scripts of npu
/verl/models/transformers: npu_patch for transformers

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Author: tardis-key

.github/CODEOWNERS

@@ -2,19 +2,21 @@
 /docs/amd_tutorial @yushengsu-thu
 /docs/slang_multiturn @zhaochenyang20 @SwordFaith
 
-/recipe/dapo @tongyx361 @PeterSH6
+/recipe/dapo @tongyx361 @PeterSH6 @vermouth1992 @tardis-key @FightingZhen @ji-huazhong
 /recipe/spin @zhaochenyang20
 /recipe/sppo @zhaochenyang20
 
 /third_party/sglang @zhaochenyang20 @SwordFaith
 /third_party/vllm @PeterSH6 @wuxibin89
+/examples/grpo_trainer @vermouth1992 @PeterSH6 @tardis-key @FightingZhen @ji-huazhong
 /verl/single_controller @zw0610 @wuxibin89 @hongpeng-guo
 /verl/trainer @eric-haibin-lin @vermouth1992 @tongyx361 @PeterSH6
 /verl/workers/engine @eric-haibin-lin @vermouth1992 @ZihengJiang
 /verl/workers/roles @eric-haibin-lin @vermouth1992 @ZihengJiang
 /verl/workers/engine/fsdp @eric-haibin-lin @vermouth1992 @ZihengJiang
 /verl/workers/rollout/vllm_rollout @wuxibin89 @PeterSH6 @chenhaiq
 /verl/workers/rollout/sglang_rollout @zhaochenyang20 @SwordFaith @chenhaiq
+/verl/models/transformers @vermouth1992 @PeterSH6 @tardis-key @FightingZhen @ji-huazhong
 
 /tests/single_controller @zw0610 @wuxibin89
 /tests/trainer @eric-haibin-lin @vermouth1992 @tongyx361 @PeterSH6