Update link and installation instructions for cuDNN 7.6.4 for CUDA 10.1 (#44646)

Author: thomasclaudiushuber

docs/machine-learning/how-to-guides/install-gpu-model-builder.md

@@ -27,7 +27,7 @@ Learn how to install the GPU drivers to use your GPU with Model Builder.
 - NVIDIA developer account. If you don't have one, [create a free account](https://developer.nvidia.com/developer-program).
 - Install dependencies:
   - Install [CUDA v10.1](https://developer.nvidia.com/cuda-10.1-download-archive-update2). Make sure you install CUDA v10.1, not any other newer version.
-  - Install [cuDNN for CUDA 10.1](https://developer.nvidia.com/rdp/cudnn-download). (You can't have multiple versions of cuDNN installed.)
+  - Install [cuDNN v7.6.4 for CUDA 10.1](https://developer.nvidia.com/rdp/cudnn-archive) from the cuDNN archive. You cannot have multiple versions of cuDNN installed. After downloading the cuDNN v7.6.4 zip file and unpacking it, copy *\<CUDNN_zip_files_path>\cuda\bin\cudnn64_7.dll* to *\<YOUR_DRIVE>\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1\bin*.
 
 ## Troubleshooting