[Fix] default branch for contributions is now 4.x in the docs

[shawnhooper]

The contribution guide still shows 3.x as the place to submit bugs to. Updated to show 4.x instead.

Summary by CodeRabbit

• Documentation
  • Updated contribution guidance to direct bug fixes and backward-compatible minor features to the 4.x branch. Major features and breaking changes remain directed to main.

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ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: Repository: vitodeploy/vito/.coderabbit.yaml
• Review profile: ASSERTIVE
• Plan: Advanced
• Run ID: 3c0f1973-7216-44fb-9ac9-ace92eecc1c2

📥 Commits

Reviewing files that changed from the base of the PR and between 8a545bf and 098b0f0.

📒 Files selected for processing (1)

• docs/4.x/prologue/contribution-guide.md

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📝 Walkthrough

Walkthrough

The contribution guide now directs bug fixes and backward-compatible minor features to 4.x. Major features and breaking changes remain directed to main.

Changes

Contribution guide

Layer / File(s)	Summary
Update branch guidance docs/4.x/prologue/contribution-guide.md	The guide changes the target for bug fixes and backward-compatible minor features from 3.x to 4.x. Major features and breaking changes remain directed to main.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~2 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to 098b0

No actionable merge-blocking risk remains in this documentation-only change.

Architecture Summary

Architecture risk: 🔵 Low · up to 098b0

The change affects 1 system.

Changed systems: docs

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — docs (service) was modified; 1 changed file maps to changed impact.

Before / after behavior

• observed — Modified behavior in docs/4.x/prologue/contribution-guide.md: The guidance changes the target for bug fixes and backward-compatible minor features from 3.x to 4.x.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly states that the contribution guide now uses 4.x as the default branch. This matches the main change.

✨ Finishing Touches

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