Update Python to v3.12.8

CUDA.md

@@ -70,7 +70,7 @@ docker build \
   --build-arg CUDA_VERSION=12.6.3 \
   --build-arg CUDA_IMAGE_SUBTAG=runtime-ubuntu22.04 \
   --build-arg R_VERSION=4.4.2 \
-  --build-arg PYTHON_VERSION=3.12.7 \
+  --build-arg PYTHON_VERSION=3.12.8 \
   -t cuda/r/ver \
   -f ver/latest.Dockerfile .
 ```

README.md

@@ -77,7 +77,7 @@ To install docker, follow the instructions for your platform:
 ```bash
 docker build \
   --build-arg R_VERSION=4.4.2 \
-  --build-arg PYTHON_VERSION=3.12.7 \
+  --build-arg PYTHON_VERSION=3.12.8 \
   -t r/ver \
   -f ver/latest.Dockerfile .
 ```

ver/.gitlab-ci.yml

 .env:
   variables:
     R_VERSION: "4.4.2"
-    PYTHON_VERSION: "3.12.7"
+    PYTHON_VERSION: "3.12.8"
     CUDA_VERSION: "12.6.3"
     CUDNN_VERSION_AMD64: "8.9.7.29"
     CUDNN_VERSION_ARM64: "8.9.7.29"