Updated CODEOWNERS to instead use RCCL-Reviewers team (#2010)

* Updated CODEOWNERS to instead use RCCL-Reviewers team

* Apply suggestion from @nileshnegi

Co-authored-by: Nilesh M Negi <Nilesh.Negi@amd.com>

---------

Co-authored-by: Nilesh M Negi <Nilesh.Negi@amd.com>

[ROCm/rccl commit: f290e302d3]

projects/rccl/.github/CODEOWNERS

@@ -1,4 +1,6 @@
-* @wenkaidu @gilbertlee-amd @PedramAlizadeh @nusislam @nileshnegi @KawtharShafie @AtlantaPepsi @mberenjk @corey-derochie-amd @mustafabar @thananon @JhaShweta1 @BertanDogancay @rahulvaidya20 @isaki001 @PJAvinash @AbandiGa @Nikhil-Nunna @haripriya-amd @atulkulk @ddebonis-amd @amd-mengshwu @Kapil-Shyam-Pawar @weilewei @nawrinsu @speriaswamy-amd# Documentation files
+* @ROCm/rccl-reviewers
+
+# Documentation files
 docs/ @ROCm/rocm-documentation
 *.md @ROCm/rocm-documentation
 *.rst @ROCm/rocm-documentation