Update CUDA version in GH workflows to 2.9.

Author: pearu

.github/scripts/unittest-windows/setup_env.sh

@@ -36,4 +36,4 @@ fi
 conda activate "${env_dir}"
 
 # 3. Install minimal build tools
-conda install -y -c conda-forge cmake ninja "ffmpeg<8"
+conda install -y -c conda-forge cmake ninja "ffmpeg<9"

.github/workflows/docs.yaml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         python-version: ["3.11"]
-        cuda-version: ["12.6"]
+        cuda-version: ["12.9"]
         ffmpeg-version: ["7"]
       fail-fast: false
     uses: pytorch/test-infra/.github/workflows/linux_job_v2.yml@main

.github/workflows/unittest-linux-gpu.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         python-version: ["3.11"]
-        cuda-version: ["12.6"]
+        cuda-version: ["12.9"]
         ffmpeg-version: ["7"]
       fail-fast: false
     uses: pytorch/test-infra/.github/workflows/linux_job_v2.yml@main

.github/workflows/unittest-windows-gpu.yml

@@ -22,7 +22,7 @@ jobs:
 
         # Set up Environment Variables
         export PYTHON_VERSION="3.10"
-        export CUDA_VERSION=12.6
+        export CUDA_VERSION=12.9
         export PIP_PROGRESS_BAR=off
         export CONDA_QUIET=1
         export USE_CUDA=1