[Common] Upgrade nccl-extensions commit

[phu0ngng]

Description

Please include a brief summary of the changes, relevant motivation and context.

Fixes # (issue)

Type of change

• Documentation change (change only to the documentation, either a fix or a new content)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Infra/Build change
• Code refactoring

Changes

Please list the changes introduced in this PR:

• Change A
• Change B

Checklist:

• I have read and followed the contributing guidelines
• The functionality is complete
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[phu0ngng]

/te-ci L1

[greptile-apps]

Greptile Summary

Updates the pinned nccl-extensions submodule revision.

• Advances 3rdparty/nccl-extensions from commit 705ca8eb38297f3a8c4af6adf4185176a1116cb9 to 9f47d6eb3b60962d8157a579b4caaaa4ae6b19f4.

Confidence Score: 5/5

The PR appears safe to merge because no blocking failure remains.

No blocking failure remains.

Important Files Changed

Filename	Overview
3rdparty/nccl-extensions	Advances the nccl-extensions submodule commit; no eligible follow-up issue was established from the available prior-thread context.

_{Reviews (2): Last reviewed commit: "Merge branch 'main' into bump_nccl_ep" | Re-trigger Greptile}

[jberchtold-nvidia]

LGTM, thanks!