[fix] fix CMM leaky

Author: Abandon-ht

projects/llm_framework/main_melotts/src/main.cpp

@@ -342,6 +342,9 @@ class llm_task {
 
     ~llm_task()
     {
+        if (decoder_) {
+            decoder_->Release();
+        }
         _ax_deinit();
     }
 };