post: Update default branch post-26.05

[mc-nv]

^{CI (internal): #52829374}

What does the PR do?

Updates the tensorrt_llm submodule pointer from 2fdb9e6 to ca88df0 so main tracks the commit required by the 26.05 upstream container build.

Changed files: tensorrt_llm (submodule).

Checklist

• I have made sure this PR is not a duplicate.
• I have made sure the commit message is clear and follows Conventional Commits.
• I have added unit tests for any new functionality.
• I have made sure all tests are passing.
• For documentation changes: I have previewed the changes and they render correctly.

Commit Type:

• feat (A new feature)
• fix (A bug fix)
• docs (Documentation-only changes)
• style (Changes that do not affect the meaning of the code — formatting, whitespace, etc.)
• refactor (A code change that neither fixes a bug nor adds a feature)
• perf (A code change that improves performance)
• test (Adding missing tests or correcting existing tests)
• build (Changes that affect the build system or external dependencies)
• ci (Changes to CI configuration files and scripts)
• chore (Other changes that don't modify src or test files)

Related PRs:

• post: Update default branch post-26.05 server#8804
• post: Update default branch post-26.05 model_analyzer#1024
• post: Update default branch post-26.05 pytorch_backend#194

Where should the reviewer start?

tensorrt_llm submodule pointer

Test plan:

Submodule pointer update only; validated by the internal Triton CI pipeline.

• CI Pipeline ID: 52829374

Caveats:

None.

Background

Part of TRI-1063 post-26.04 release maintenance: bump the TensorRT-LLM submodule on main to the commit aligned with the 26.05 upstream container.

Related Issues:

Resolves: TRI-1063