chore(compose):remove obsolete version: key from Docker Compose files

[pkalsi97]

📄 Summary

• Removed the obsolete version attribute from the docker-compose.yaml and docker-compose.ha.yaml.
• This attribute is no longer supported and causes warnings during execution of ./install.sh in signoz/deploy/

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✅ Changes

• Feature: Brief description
• Bug fix: Brief description

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🏷️ Required: Add Relevant Labels

• devops
• backend

⚠️ Manually add appropriate labels in the PR sidebar
Please select one or more labels (as applicable):

ex:

• frontend
• backend
• devops
• bug
• enhancement
• ui
• test

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👥 Reviewers

Tag the relevant teams for review:

• frontend / backend / devops

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🧪 How to Test

1. ...
2. ...
3. ...

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🔍 Related Issues

Closes #

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📸 Screenshots / Screen Recording (if applicable / mandatory for UI related changes)

Before

After

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📋 Checklist

• Dev Review
• Test cases added (Unit/ Integration / E2E)
• Manually tested the changes

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👀 Notes for Reviewers

[welcome]

Welcome to the SigNoz community! Thank you for your first pull request and making this project better. 🤗

[CLAassistant]

All committers have signed the CLA.

[pkalsi97]

@maintainers The CODEOWNERS entry @SigNoz/devops points to a non-existent team.
PRs touching /deploy/ or .github get no reviewer.