codeowners : add ZenDNN backend codeowner

[z-vishal]

Overview

Adding @avinashcpandey and @Jiten1parmar from AMD as a code owners for ZenDNN backend

Requirements

• I have read and agree with the contributing guidelines
• AI usage disclosure: NO

cc: @amukho @avinashcpandey @Jiten1parmar

[z-vishal]

Hey @ggerganov and @taronaeo, I want to add @avinashcpandey and @Jiten1parmar from AMD ZenDNN team as a code owners for ZenDNN backend because they are the ones who lead the development

[taronaeo]

There is no such team for @ggml-org/zendnn. I suggest replacing that with your individual GitHub handles :)

[z-vishal]

hey @taronaeo removed the team handle and also added my handle too :)