Update Holoscan SDK version requirement to 3.2.0

- Updated minimum Holoscan SDK version from 2.5.0 to 3.2.0 in streaming_client_demo README

Signed-off-by: cdinea <cdinea@nvidia.com>

Author: cdinea

applications/streaming_client_demo/README.md

@@ -47,7 +47,7 @@ graph TD
 
 - NVIDIA GPU
 - CUDA 12.1 or higher
-- Holoscan SDK 2.5.0 or higher
+- Holoscan SDK 3.2.0 or higher
 
 ## Setup Instructions