chore: update CHANGELOG.md for v0.2.15

[Copilot]

Adds the v0.2.15 changelog entry covering PRs merged since v0.2.14, and fixes the changelog generator to exclude release-related PRs from future changelogs.

Changes

• Bug Fixes
  • PoP token flow crash with nil pointer in cache.Replace when running non-root ([Bug Fix] - PoP token flow crash with nil pointer in cache.Replace when running non-root #736, @vineeth-thumma)
• Enhancements
  • Automate CHANGELOG.md generation for releases (feat: automate CHANGELOG.md generation for releases #737, @copilot)

Changelog Generator Fix

Updated hack/changelog-generator/main.go to exclude PRs carrying a release label from the generated changelog. This is more reliable than title-pattern matching. A new hasLabel helper (case-insensitive) was added, and getMergedPRsSince was updated to filter out any PR with the release label in addition to the existing version-prefixed title filter. Added TestHasLabel in main_test.go to cover the new helper.

Adding the release label to changelog update PRs (like this one) will prevent them from appearing in future changelogs.

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[weinong]

@copilot I think this PR title will make this change included in the changelog generator.
https://github.com/Azure/kubelogin/blob/main/hack/changelog-generator/main.go

[Copilot]

@copilot I think this PR title will make this change included in the changelog generator.
https://github.com/Azure/kubelogin/blob/main/hack/changelog-generator/main.go

Good catch! Fixed in e6c6cd8 — updated the changelog generator to also exclude PR titles matching update.*changelog / changelog.*update patterns (case-insensitive), so PRs like this one won't appear in future changelogs. Added test cases for the new patterns as well.

[weinong]

@copilot would it be more reliable to use release label on the PR?

[Copilot]

@copilot would it be more reliable to use release label on the PR?

Done in f337e8c. Replaced the fragile title-regex approach with a release label check — any PR carrying the release label is now excluded from the changelog. The hasLabel function is case-insensitive. Adding the release label to this PR will prevent it from appearing in future changelogs.

[weinong]

LGTM