[DOC] Fix outdated version-pinned doc URLs

[XAheli]

Summary

Replace version-pinned GitHub blob/tree URLs (specific commit hashes and release/0.4, release/0.6, release/1.0, release/1.2 branches) with /main/ references across 10 doc files. Update docs.pytorch.org/executorch/0.4/ URL to use /stable/. Update all line number anchors to match the current main branch.

Fixes #19257

Test plan

• All 29 updated URLs verified to return HTTP 200 via curl
• All file paths confirmed to exist on main locally
• All 21 line number references verified to point to the correct code (class/function definitions)
• lintrunner -a passes with no lint issues

cc @mergennachin @AlannaBurke @digantdesai @freddan80 @per @zingo @oscarandersson8218 @mansnils @Sebastian-Larsson @robell

[pytorch-bot]

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[Copilot]

Pull request overview

This PR updates ExecuTorch documentation to remove outdated, version-pinned GitHub URLs (commit hashes and release branches) in favor of main references, and refreshes line anchors / docs-site version links so references remain accurate on the current codebase.

Changes:

• Replace pinned github.com/pytorch/executorch blob/tree links with .../main/... across multiple docs.
• Update various GitHub line-number anchors to current main locations.
• Update an old docs.pytorch.org/executorch/0.4/... reference to the stable docs site.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
docs/source/using-executorch-android.md	Update workflow link for AAR generation to point at main.
docs/source/compiler-memory-planning.md	Update greedy memory-planning implementation link to main with a refreshed line anchor.
docs/source/compiler-custom-compiler-passes.md	Refresh main links/anchors for pass/partitioner references (ExecuTorch + PyTorch).
docs/source/bundled-io.md	Update example-runner links from release branches to main (with anchors preserved).
docs/source/backends/xnnpack/xnnpack-partitioner.rst	Update XNNPACK partitioner/config links from release/0.6 to main and adjust anchors.
docs/source/backends/nxp/nxp-partitioner.rst	Update NXP Neutron links from release/1.2 to main.
docs/source/backends/nxp/nxp-overview.md	Update NXP example script link from release/1.0 to main.
docs/source/backends/arm-ethos-u/arm-ethos-u-troubleshooting.md	Update bundled-io docs link from a versioned docs path to stable.
docs/source/backends-qualcomm.md	Update Qualcomm backend links from pinned commit trees to main.
docs/source/api-life-cycle.md	Update PyTorch/ExecuTorch example links to main with refreshed anchors.

Comments suppressed due to low confidence (2)

docs/source/api-life-cycle.md:111

• There is an unmatched closing </ul> tag inside this table cell (no <ul> exists anywhere in the file). This produces invalid HTML and can break rendering in some doc toolchains. Please remove the stray </ul> (or add the missing opening tag if a list is intended).

Use <code>.. warning::</code> in the docstrings of deprecated and experimental
APIs. See
<a href="https://github.com/pytorch/pytorch/blob/main/torch/nn/utils/stateless.py#L176">example
usage</a>.

</ul>
   </td>

docs/source/api-life-cycle.md:124

• There is an unmatched closing </ul> tag in this table cell (no <ul> exists in the file). Please remove this stray closing tag (or add the missing opening tag) to keep the generated HTML valid.

Use the <code>ET_DEPRECATED</code> annotation macro. See <a href="https://github.com/pytorch/executorch/blob/main/runtime/executor/program.h#L92">example usage</a>.

<p>
<p>
Use the <code>ET_EXPERIMENTAL</code> annotation macro.
</ul>
   </td>

---

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[XAheli]

@pytorchbot label "module: doc"

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