Update documents for Express SDK update

[neuropilot-captain]

Summary

Update the document for Express SDK update

cc @cccclai @cbilgin

[pytorch-bot[bot]]

:link: Helpful Links

:test_tube: See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/10462

• :page_facing_up: Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

:x: 1 New Failure

As of commit ccd44b34bc00ebbb5c8dbec8ac0f38a68f026e57 with merge base a325c56864c5b25630c1ebda03c8f16a96a02a19 ():

NEW FAILURE - The following job has failed:

• Check Labels / Check labels (gh) RuntimeError: Error checking labels: PR does not have required labels

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[github-actions[bot]]

This PR needs a release notes: label

If your changes are user facing and intended to be a part of release notes, please use a label starting with release notes:.

If not, please add the topic: not user facing label.

To add a label, you can comment to pytorchbot, for example @pytorchbot label "topic: not user facing"

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[neuropilot-captain]

@pytorchbot label "partner: mediatek"