Update tutorial-arm-ethos-u.md

[psiddh]

• Explicitly specify paths to FVP simulator with different examples / usages

Summary

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[PLEASE REMOVE] If this PR introduces a fix or feature that should be the upcoming release notes, please add a "Release notes: " label. For a list of available release notes labels, check out CONTRIBUTING.md's Pull Requests.

Test plan

[PLEASE REMOVE] How did you test this PR? Please write down any manual commands you used and note down tests that you have written if applicable.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/11625

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❌ 1 New Failure

As of commit ea57693 with merge base d719e8e ():

NEW FAILURE - The following job has failed:

• pull / test-mediatek-models-linux / linux-job (gh)
  RuntimeError: Command docker exec -t bc154803ff74e2f4bef52279de4f794aa39d880ed506d62676b43f3e8d0886f9 /exec failed with exit code 127

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[larryliu0820]

Thank you!