ggml-zendnn : update ZenDNN git tag to main branch (ggml-org#19133)

Author: z-vishal

ggml/src/ggml-zendnn/CMakeLists.txt

@@ -21,7 +21,7 @@ if (NOT ZENDNN_ROOT OR ZENDNN_ROOT STREQUAL "" OR ZENDNN_ROOT STREQUAL "OFF")
     ExternalProject_Add(
         zendnn
         GIT_REPOSITORY https://github.com/amd/ZenDNN.git
-        GIT_TAG zendnnl
+        GIT_TAG 21ce8f7879c86bf3637f707fae6f29e0951db5fe
         PREFIX      ${ZENDNN_PREFIX}
         SOURCE_DIR  ${ZENDNN_SOURCE_DIR}
         BINARY_DIR  ${ZENDNN_BUILD_DIR}