Update tutorial-arm-ethos-u.md (#11531)

Add 'EULA' argument to setup.sh script

### Summary
[PLEASE REMOVE] See [CONTRIBUTING.md's Pull
Requests](https://github.com/pytorch/executorch/blob/main/CONTRIBUTING.md#pull-requests)
for ExecuTorch PR guidelines.

[PLEASE REMOVE] If this PR closes an issue, please add a `Fixes
#<issue-id>` line.

[PLEASE REMOVE] If this PR introduces a fix or feature that should be
the upcoming release notes, please add a "Release notes: <area>" label.
For a list of available release notes labels, check out
[CONTRIBUTING.md's Pull
Requests](https://github.com/pytorch/executorch/blob/main/CONTRIBUTING.md#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.

Author: psiddh

docs/source/tutorial-arm-ethos-u.md

@@ -50,7 +50,11 @@ In the following sections we will walk through the steps to download each of the
 
 In this section, we will do a one-time setup, like downloading and installing necessary software, for the platform support files needed to run ExecuTorch programs in this tutorial.
 
-For that we will use the `examples/arm/setup.sh` script to pull each item in an automated fashion. It is recommended to run the script in a conda environment. Upon successful execution, you can directly go to [the next step](#convert-the-pytorch-model-to-the-pte-file).
+For that we will use the `examples/arm/setup.sh` script to pull each item in an automated fashion. It is recommended to run the script in a conda environment.
+```bash
+examples/arm/setup.sh --i-agree-to-the-contained-eula
+```
+Upon successful execution, you can directly go to [the next step](#convert-the-pytorch-model-to-the-pte-file).
 
 As mentioned before, we currently support only Linux based platforms with x86_64 or aarch64 processor architecture. Let’s make sure we are indeed on a supported platform.