all tensor learning_rate for tf.train.GradientDescentOptimizer

src/TensorFlowNET.Core/APIs/tf.train.cs

@@ -34,6 +34,9 @@ namespace Tensorflow
             public Optimizer GradientDescentOptimizer(float learning_rate) 
                 => new GradientDescentOptimizer(learning_rate);
 
+            public Optimizer GradientDescentOptimizer(Tensor learning_rate)
+                => new GradientDescentOptimizer(learning_rate);
+
             public Optimizer AdamOptimizer(float learning_rate, string name = "Adam") 
                 => new AdamOptimizer(learning_rate, name: name);