Minor edits to the install guide

[ktangsali]

PhysicsNeMo Pull Request

Description

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.
• The CHANGELOG.md is up to date with these changes.
• An issue is linked to this pull request.
• If I am implementing a new model or modifying any existing model, I have followed the Models Implementation Coding Standards.

Dependencies

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[greptile-apps]

Greptile Summary

This PR makes minor editorial improvements to the Installation section of README.md, making the guide more concise and upfront about the two supported installation paths (pip/uv and NVIDIA container image). No functional or factual changes are introduced.

• Rewrote the intro paragraph to immediately surface both supported install methods.
• Collapsed two separate intro paragraphs into one for brevity.
• Simplified the PyPI section subheading from a full sentence to a short imperative phrase.
• Added "from source" to the uv section to clarify its intended use-case.
• Removed "recommended" from the NVCR Container section, treating all methods equally.

Important Files Changed

Filename	Overview
README.md	Minor editorial updates to the Installation section: rewrote intro paragraph to surface both install methods upfront, simplified the PyPI section header, added "from source" to the uv section, and removed "recommended" from the NVCR Container heading. No factual inaccuracies or broken links introduced.

_{Last reviewed commit: 5f52411}

[peterdsharpe]

LGTM