docs: clarify v3 changelog is auto-generated in CONTRIBUTING.md

[Grantmartin2002]

Description

CONTRIBUTING.md tells v3 contributors to update v3/UNRELEASED_CHANGELOG.md, but that contradicts the PR template, which says v3 changelog entries are added automatically.

The template is the accurate one. .github/workflows/auto-changelog-v3.yml runs on PR merge and auto-generates a v3 changelog entry; it only skips the auto-fill when the PR already touched v3/UNRELEASED_CHANGELOG.md. So a v3 entry is never required from the contributor — at most it's an optional way to control the wording.

This updates the CONTRIBUTING.md v3 line to match that behaviour: entries are added automatically, with a manual entry as an optional override. No change to the PR template, which was already correct.

Fixes #5623

Type of change

• This change requires a documentation update

How Has This Been Tested?

Documentation-only change to CONTRIBUTING.md. No code paths are affected, so there is nothing to run on a specific OS. Verified the new wording matches the actual auto-changelog-v3.yml behaviour and the existing PR template statement.

• Windows
• macOS
• Linux

Test Configuration

N/A — documentation-only change, wails doctor not applicable.

Checklist:

• (v2 only) I have updated website/src/pages/changelog.mdx with details of this PR (v3 changelog entries are added automatically)
• My code follows the general coding style of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• 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
• New and existing unit tests pass locally with my changes

Summary by CodeRabbit

• Documentation
  • Updated v3 (alpha) contribution guidelines to clarify that changelog entries are generated automatically on merge, and how to control the wording for your changes.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: c40eb44d-9937-4c03-a41d-b04ec77b69af

📥 Commits

Reviewing files that changed from the base of the PR and between 420e336 and 556c5d7.

📒 Files selected for processing (1)

• CONTRIBUTING.md

✅ Files skipped from review due to trivial changes (1)

• CONTRIBUTING.md

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Walkthrough

A single line in CONTRIBUTING.md is updated to replace the instruction to manually update v3/UNRELEASED_CHANGELOG.md with a description that v3 changelog entries are added automatically on PR merge, and that contributors can optionally add an entry to v3/UNRELEASED_CHANGELOG.md to control the wording.

Changes

Changelog Contribution Guidance Fix

Layer / File(s)	Summary
v3 changelog instruction update CONTRIBUTING.md	Rewrites the v3 changelog line to describe PR-merge automation and direct contributors to v3/UNRELEASED_CHANGELOG.md only for optional custom wording.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• wailsapp/wails#5269: Also modifies CONTRIBUTING.md v3 contribution instructions related to changelog wording via v3/UNRELEASED_CHANGELOG.md.

Suggested labels

Documentation

Poem

🐇 A line once misled, now set right,
The changelog writes itself at night!
No manual toil, just merge and see,
v3 entries flowing free ~
Hop along, contributors — it's easy as can be! 🌟

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically summarizes the main change: clarifying that v3 changelog is auto-generated in the CONTRIBUTING.md file.
Description check	✅ Passed	The description provides a clear summary of the issue, explains the contradiction between CONTRIBUTING.md and the PR template, details the actual behavior from auto-changelog-v3.yml, and documents the fix with proper issue reference.
Linked Issues check	✅ Passed	The PR directly addresses issue #5623 by updating CONTRIBUTING.md to clarify that v3 changelog entries are auto-generated with optional manual overrides, fully meeting the issue's stated objective.
Out of Scope Changes check	✅ Passed	The PR only modifies CONTRIBUTING.md to clarify v3 changelog documentation, which is precisely the scope of issue #5623 with no unrelated changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[leaanthony]

Thank you! 🙏