Update GitHub Action Versions

[morisil]

GitHub Actions Version Updates

• actions/setup-java published a new release v5.4.0 on 2026-06-25T15:38:03Z
• anthropics/claude-code-action published a new release v1.0.158 on 2026-06-25T21:47:33Z

[claude]

Code Review\n\nThis PR performs routine version bumps for two GitHub Actions across three workflow files:\n- actions/setup-java v5.3.0 to v5.4.0 (in build-gradle.yml)\n- anthropics/claude-code-action v1.0.157 to v1.0.158 (in claude-code.yml and claude-code-review.yml)\n\nThe two files using claude-code-action are updated in lockstep, which is correct. The PR is consistent with its stated intent.\n\n---\n\n### Finding — reference/build-release.yml not updated (stale versions)\n\nThe file .github/workflows/reference/build-release.yml was not touched by this PR and now lags significantly behind the other workflows:\n\n- actions/checkout: v6.0.1 in reference vs v7.0.0 in build-gradle.yml\n- actions/setup-java: v5.1.0 in reference vs v5.4.0 in build-gradle.yml (just updated)\n- gradle/actions/setup-gradle: v5.0.0 in reference vs v6.2.0 in build-gradle.yml\n\nSince this is a reference workflow that downstream repositories may copy or use as a template, leaving it on old versions can cause confusion. Consumers would get stale action versions without the fixes and improvements from the intervening releases.\n\nSuggestion: Include reference/build-release.yml in this version-bump sweep.\n\n---\n\n### Observation — Cron comment mismatch in action-version-updater.yml (pre-existing)\n\nLine 7 of action-version-updater.yml has a stale header comment 'Automatically run on every Sunday' while the cron expression 0 0 * * * runs daily at midnight UTC, not weekly. Weekly on Sunday would be 0 0 * * 0. This is pre-existing and not introduced by this PR, but a minor cleanup opportunity.\n\n---\n\nOverall this is a clean, straightforward version-bump PR. The only actionable item is including the reference workflow in the update.