fixes the "Installing dependencies" section in pip install docs

[shryt]

Description

In the Local Installation / Installation using Isaac Lab Pip Packages page of the documentation, the “Installing dependencies” section is broken. I removed duplicate content and corrected the ordering.

Fixes #3967

Type of change

• Documentation update

Screenshots

Before	After

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

Fixed broken "Installing dependencies" section in the Isaac Lab pip installation documentation by removing duplicate content and correcting the installation order.

Key Changes:

• Removed duplicate PyTorch installation instructions (previously appeared twice)
• Removed duplicate Isaac Lab installation instructions
• Removed outdated Isaac Lab v2.2.0 installation, keeping only v2.3.0
• Reordered steps to follow logical sequence: PyTorch → Isaac Lab → rl_games
• Consolidated PyTorch description text to include architecture reference inline
• Added contributor name to CONTRIBUTORS.md

The changes successfully address issue #3967 by cleaning up the documentation structure and providing a single, clear installation path for users.

Confidence Score: 5/5

• This PR is safe to merge with no risk
• The changes are purely documentation fixes that remove duplicate content and correct ordering. No code logic is affected, RST syntax is correct, and the contributor was properly added alphabetically. The fix directly addresses the reported issue with clear before/after screenshots provided.
• No files require special attention

Important Files Changed

File Analysis

Filename	Score	Overview
CONTRIBUTORS.md	5/5	Added author name in alphabetical order
docs/source/setup/installation/isaaclab_pip_installation.rst	5/5	Removed duplicate content, corrected ordering of installation steps, and updated to use version 2.3.0

Sequence Diagram

sequenceDiagram
    participant Author as PR Author
    participant Docs as Documentation (RST)
    participant Users as End Users
    
    Author->>Docs: Identify duplicate content issue
    Author->>Docs: Remove duplicate PyTorch installation
    Author->>Docs: Remove duplicate Isaac Lab install (v2.2.0)
    Author->>Docs: Reorder steps (PyTorch first, then Isaac Lab)
    Author->>Docs: Consolidate PyTorch description text
    Author->>Docs: Keep only Isaac Lab v2.3.0
    Docs->>Users: Provide clearer installation instructions
    Docs->>Users: Avoid confusion from duplicates
    Users->>Docs: Follow streamlined installation process

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[greptile-apps]

Greptile Overview

Greptile Summary

This PR fixes documentation issues in the pip installation guide by removing duplicate content and correcting the installation order. The changes eliminate redundant PyTorch installation instructions, remove the outdated Isaac Lab 2.2.0 installation command (keeping only 2.3.0), and reorder steps logically (PyTorch → Isaac Lab → rl_games). The PR also adds the contributor's name to CONTRIBUTORS.md in alphabetical order.

Confidence Score: 5/5

• This PR is safe to merge with no risk
• Documentation-only changes that fix clear formatting issues with no code impact. The changes correctly remove duplicates, fix ordering, and update to the current version (2.3.0)
• No files require special attention

Important Files Changed

File Analysis

Filename	Score	Overview
docs/source/setup/installation/isaaclab_pip_installation.rst	5/5	Removed duplicate installation instructions, outdated version references, and fixed ordering in the "Installing dependencies" section
CONTRIBUTORS.md	5/5	Added contributor name in correct alphabetical order

Sequence Diagram

sequenceDiagram
    participant User
    participant Docs as Documentation Site
    participant File as isaaclab_pip_installation.rst
    
    User->>Docs: Navigate to pip installation guide
    Docs->>File: Render Installing dependencies section
    
    Note over File: Before PR had duplicate content
    Note over File: 2 PyTorch install methods
    Note over File: 2 Isaac Lab versions (2.2.0 and 2.3.0)
    Note over File: 2 UV pip notes
    Note over File: Wrong order (rl_games before Isaac Lab)
    
    File->>User: Show confusing duplicated instructions
    
    Note over File: After PR has clean content
    Note over File: 1 PyTorch install (tabbed for platforms)
    Note over File: 1 Isaac Lab version (2.3.0 only)
    Note over File: 1 UV pip note
    Note over File: Correct order (PyTorch then Isaac Lab then rl_games)
    
    File->>User: Show clear organized instructions

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