Update changelog for v10.2.1

[justin808]

Summary

• Stamps ## [v10.2.1] - July 5, 2026 immediately after ## [Unreleased], moving the existing unreleased entries (webpack-dev-server v6 support, SWC/Babel fallback fixes, production-env config fallback, and helper binstub PATH fix) into the new version section.
• Adds the [v10.2.1] compare link and updates [Unreleased] to compare from v10.2.1...main.

No new entries were needed: a classification sweep of v10.2.0..origin/main found only #1102, #1206, #1200, and #1201 as user-visible (all already present in Unreleased), plus #1202 (CI-only) and #1208 (docs-only) which are correctly excluded.

Test plan

• Verified CHANGELOG.md diff manually
• Confirmed file ends with a trailing newline

Summary by CodeRabbit

• Documentation
  • Updated the changelog with a new v10.2.1 release entry dated July 5, 2026.
  • Refreshed version comparison links so the latest release is now shown against the main branch, with a new link for comparing v10.2.0 to v10.2.1.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: e31d546d-2e39-47cb-b4b0-4dd3babf3299

📥 Commits

Reviewing files that changed from the base of the PR and between 564cc4e and 6db4955.

📒 Files selected for processing (1)

• CHANGELOG.md

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Walkthrough

This PR updates CHANGELOG.md by inserting a new v10.2.1 release entry dated July 5, 2026, positioned after the Unreleased section, and updating the bottom compare reference links to reflect the new version.

Changes

Changelog Update

Layer / File(s)	Summary
Add v10.2.1 release entry and compare links CHANGELOG.md	Adds a ## [v10.2.1] - July 5, 2026 heading after Unreleased and updates compare links so Unreleased compares from v10.2.1 while a new v10.2.1 compare entry (v10.2.0...v10.2.1) is added.

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

Possibly related PRs

• shakacode/shakapacker#1139: Both PRs add a new release entry to CHANGELOG.md and update the corresponding compare links at the bottom of the file.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely summarizes the changelog update for the v10.2.1 release.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch jg/update-changelog-10.2.1

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[greptile-apps]

Greptile Summary

This PR stamps the v10.2.1 release in CHANGELOG.md by inserting the version header and date immediately after the ## [Unreleased] section, leaving [Unreleased] empty, and updating the compare links at the bottom of the file.

• Adds ## [v10.2.1] - July 5, 2026 header to group the four existing unreleased entries (webpack-dev-server v6 support, SWC/Babel fallback, production-env config fallback, and PATH fix) under the new release.
• Updates the [Unreleased] footer link to compare from v10.2.1...main and adds the new [v10.2.1]: .../compare/v10.2.0...v10.2.1 compare link.

Confidence Score: 5/5

Safe to merge — documentation-only change with no code impact.

The change only modifies CHANGELOG.md: a new version header is inserted, the [Unreleased] section is left empty, existing entries are correctly grouped under v10.2.1, and both footer compare links are updated consistently. The diff is small, manually verified, and has no correctness risk.

No files require special attention.

Important Files Changed

Filename	Overview
CHANGELOG.md	Changelog stamped correctly: v10.2.1 header added after [Unreleased], existing entries moved into the new section, and footer compare links updated consistently.

_{Reviews (1): Last reviewed commit: "Update changelog for v10.2.1" | Re-trigger Greptile}