Modifies readme node version number

[christiansaavedra]

For webapp, Modifies Node version number on readme.md, so that it matches package.json node engine

Testing

Explain how you tested this PR and give clear steps so the reviewer can replicate.

Backend checklist

• Added tests for any new code or added a regression test if fixing a bug
• Run the backend locally and it works
• Added migrations if there are any database changes, rebased onto develop if necessary for linear migration history

Web frontend checklist

• There are no console warnings when running the app
• Added tests where relevant
• Clicked around my changes running locally and it works
• Checked Desktop, Mobile and Tablet screen sizes

For maintainers

• Maintainers can push commits to my branch
• Maintainers can merge this PR for me

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Project	Deployment	Actions	Updated (UTC)
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[aapeliv]

lgtm

[github-actions]

📝 Release Notes

This PR does not need to be included in release notes.

Reason: This PR only updates developer documentation in the README to match the required Node.js version. It does not affect end users or represent significant technical infrastructure work for the platform itself.

🤖 Bot Debug Information

Model: couchers.openai.gpt-5.4
Decision: exclude
Reasoning: This PR only updates developer documentation in the README to match the required Node.js version. It does not affect end users or represent significant technical infrastructure work for the platform itself.