Update Launchable deploy link

[sheikh-nv]

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context.
List any dependencies that are required for this change.

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (existing functionality will not work without user modification)
• Documentation update

Screenshots

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Checklist

• I have read and understood the contribution guidelines
• I have run the pre-commit checks with ./isaaclab.sh --format
• 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
• I have updated the changelog and the corresponding version in the extension's config/extension.toml file
• I have added my name to the CONTRIBUTORS.md or my name already exists there

[greptile-apps]

Greptile Overview

Greptile Summary

Updated the NVIDIA Brev Launchable deployment link to point to a new environment configuration. The changes include:

• Updated URL path from /launchable/deploy to /launchable/deploy/now
• Updated environment ID from env-31ezDWyp4LvtDQr5rUhAWOUMFhn to env-35JP2ywERLgqtD0b0MIeK1HnF46

This is a straightforward documentation update with no code changes or functional impact on the codebase itself.

Confidence Score: 5/5

• This PR is safe to merge with no risk
• The change only updates a documentation link URL and environment ID. No code logic, dependencies, or functionality is modified. The change is isolated to a single RST documentation file.
• No files require special attention

Important Files Changed

File Analysis

Filename	Score	Overview
docs/source/setup/quickstart.rst	5/5	Updated Brev Launchable deploy link URL and environment ID - straightforward documentation change

Sequence Diagram

sequenceDiagram
    participant User
    participant Documentation
    participant BrevPlatform
    
    User->>Documentation: Reads quickstart guide
    Documentation->>Documentation: Shows Launchable button
    User->>Documentation: Clicks deploy button
    Documentation->>BrevPlatform: Redirects to deploy/now endpoint
    BrevPlatform->>BrevPlatform: Loads environment env-35JP2ywERLgqtD0b0MIeK1HnF46
    BrevPlatform->>User: Provides cloud compute environment

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[github-actions]

Test Results Summary

2 690 tests   2 229 ✅  2h 18m 37s ⏱️
  100 suites    461 💤
    1 files        0 ❌

Results for commit 559eae9.