Build: Update TRT release branch referenced in model gen file

[pvijayakrish]

What does the PR do?

Update TRT release branch referenced in model gen file. Looks like this branch name is currently updated manually and only referenced in one place. Example pipeline is shared in JIRA ticket.

Checklist

• [x] PR title reflects the change and is of format <commit_type>: <Title>
• [x] Changes are described in the pull request.
• [ ] Related issues are referenced.
• [ ] Populated github labels field
• [ ] Added test plan and verified test passes.
• [ ] Verified that the PR passes existing CI.
• [ ] Verified copyright is correct on all changed files.
• [ ] Added succinct git squash message before merging ref.
• [ ] All template sections are filled out.
• [ ] Optional: Additional screenshots for behavior/output changes with before/after.

Commit Type:

Check the conventional commit type box here and add the label to the github PR.

• [x] build
• [ ] ci
• [ ] docs
• [ ] feat
• [ ] fix
• [ ] perf
• [ ] refactor
• [ ] revert
• [ ] style
• [ ] test