Update err msg to say 8 without caveat

Author: Dan-Flores

src/torchcodec/_core/ops.py

@@ -69,7 +69,7 @@ def load_torchcodec_shared_libraries():
     raise RuntimeError(
         f"""Could not load libtorchcodec. Likely causes:
           1. FFmpeg is not properly installed in your environment. We support
-             versions 4, 5, 6, and 7 on all platforms, and 8 on Mac and Linux.
+             versions 4, 5, 6, 7, and 8.
           2. The PyTorch version ({torch.__version__}) is not compatible with
              this version of TorchCodec. Refer to the version compatibility
              table: