fix(pr-template): redundant release note check-box

[kurtisc]

Removes the check-box compelling pull request developers to add notes to the changelog manually.

Linked Issue

Closes #1498

Summary

Removes a checkbox from this PR template, as it is not actually necessary. CHANGELOG.md is generated from commit message titles, which must follow Conventional Commits.

Test Plan

N/A

Checklist

• An issue exists and is linked above
• All commits are signed-off, using DCO
• All new code follows the project's coding standards (CLAUDE.md) and is covered by tests
• Public-facing changes are paired with documentation updates
• Release note has been added to CHANGELOG.md if needed

[gemini-code-assist]

Caution

The consumer version of Gemini Code Assist on GitHub has been sunset. All code review activity has officially ceased.

[github-actions]

PR Review Summary

Size

Metric	Value
Lines added	+0
Lines removed	-1
Total changed	1
Classification	Small (< 50 lines)

Affected crates

No crate source directories are directly affected.

Blast radius — Contained

This PR touches: documentation

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_{Updated automatically on each push to this PR.}

[nogent-nolabs-ai]

nogent code review

No blocking issues; 0 suggestions.

Findings: none flagged in scope.

_{Automated code + security review. CI already covers clippy, rustfmt, tests, cargo-audit and commit-lint.}

[SequeI]

thanks!