drop unsupported cuda 12.9

Author: Daniel Flores

.github/workflows/linux_cuda_wheel.yaml

@@ -66,7 +66,7 @@ jobs:
           # the wheel unless the label ciflow/binaries/all is present in the
           # PR.
         python-version: ['3.10', '3.11', '3.12', '3.13']
-        cuda-version: ['12.6', '12.8', '12.9', '13.0']
+        cuda-version: ['12.6', '12.8', '13.0']
         # TODO: put back ffmpeg 5 https://github.com/pytorch/torchcodec/issues/325
         ffmpeg-version-for-tests: ['4.4.2', '5', '6', '7', '8.0']