fix gpu adam fusion kernel

mindspore/ccsrc/backend/kernel_compiler/gpu/nn/fused_adam_weight_decay.h

@@ -33,7 +33,7 @@ class FusedAdamWeightDecayGpuKernel : public GpuKernel {
 
   bool Init(const CNodePtr &kernel_node) override {
     auto node_name = AnfAlgo::GetCNodeName(kernel_node);
-    if (node_name == "AdamWeighDecay") {
+    if (node_name == "FusedAdamWeightDecay") {
       weight_decay_ = true;
     }