ci : add AMD ZenDNN label to PR labeler (#21345)

* ci : add AMD CPU label to PR labeler
Add automatic labeling for PRs that modify AMD CPU (ZenDNN) backend files

* ci : rename label AMD CPU to AMD ZenDNN in labeler config

Co-authored-by: Aaron Teo <taronaeo@gmail.com>

---------

Co-authored-by: Aaron Teo <taronaeo@gmail.com>

Author: z-vishal

.github/labeler.yml

@@ -27,6 +27,11 @@ IBM zDNN:
         - any-glob-to-any-file:
             - ggml/include/ggml-zdnn.h
             - ggml/src/ggml-zdnn/**
+AMD ZenDNN:
+    - changed-files:
+        - any-glob-to-any-file:
+            - ggml/include/ggml-zendnn.h
+            - ggml/src/ggml-zendnn/**
 documentation:
     - changed-files:
         - any-glob-to-any-file: