CUDA: Update to v12.6.3

Author: benz0li

README.md

@@ -315,8 +315,9 @@ What makes this project different:
 
 CUDA-based images:
 
-1. Derived from [`nvidia/cuda:12.6.1-runtime-ubuntu22.04`](https://hub.docker.com/r/nvidia/cuda/tags?page=1&name=12.6.1-runtime-ubuntu22.04)
+1. Derived from [`nvidia/cuda:12.6.3-runtime-ubuntu22.04`](https://hub.docker.com/r/nvidia/cuda/tags?page=1&name=12.6.3-runtime-ubuntu22.04)
 1. TensortRT and TensorRT plugin libraries
+    * Dropped for images with Python versions ≥ 3.13.0
 
 See [Notes](NOTES.md) and [CUDA Notes](CUDA_NOTES.md) for tweaks, settings, etc.