Fix typo in streamreader_basic_tutorial.py

:link: Helpful Links

:test_tube: See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/audio/3790

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:x: 2 New Failures

As of commit 0e217f65704b5647fd5d6abdc8025db5d8c8c857 with merge base ea437b31ce316ea3d66fe73768c0dcb94edb79ad ():

NEW FAILURES - The following jobs have failed:

* [Build Linux Conda / pytorch/audio / upload / conda-py3_8-cuda12_4](https://hud.pytorch.org/pr/pytorch/audio/3790#25240425104) ([gh](https://github.com/pytorch/audio/actions/runs/9064083509/job/25240425104)) `Unable to find an artifact with the name: pytorch_audio__3.8_cu124_` * [Unit-tests on Linux GPU / tests (3.9, 11.8) / linux-job](https://hud.pytorch.org/pr/pytorch/audio/3790#25238918057) ([gh](https://github.com/pytorch/audio/actions/runs/9064083463/job/25238918057)) `##[error]The operation was canceled.`

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pytorch / audio