[TRTLLM-14772][doc] Add sudo to apt prerequisites

[bobboli]

Description

Add sudo to both apt-get invocations in the build-from-source prerequisites so the documented command works for the default non-root user.

Fixes NVBug 6533915.

Test Coverage

• pre-commit run --files docs/source/installation/build-from-source.md
• git diff --check

PR Checklist

• Reviewed the checklist in the pull request template; the applicable requirements are satisfied.

Dev Engineer Review

• Updated both apt-get prerequisite commands in docs/source/installation/build-from-source.md to use sudo.
• The change supports the default non-root user.
• The documentation change is consistent and has no API, performance, or regression impact.
• Pre-commit checks and git diff --check passed.

QA Engineer Review

No test changes.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between fdf7bd5 and fbd8d53.

📒 Files selected for processing (1)

• docs/source/installation/build-from-source.md

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Walkthrough

The build-from-source documentation now uses sudo for both apt-get operations in the Git and Git LFS installation command.

Changes

Installation documentation

Layer / File(s)	Summary
Use sudo for apt-get operations docs/source/installation/build-from-source.md	The Git and Git LFS installation command now uses sudo for both apt-get operations.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Suggested reviewers: bowenfu

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title follows the required ticket and type format and clearly describes the documentation change.
Description check	✅ Passed	The description includes the issue, solution, validation steps, and a completed checklist relevant to this documentation change.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

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[bobboli]

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[tensorrt-cicd]

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[tensorrt-cicd]

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