Docs/fix typos and outdated refs

[Bodlux]

Summary

Small documentation fixes across CI/CD configuration files:

Changes

• .github/actions/setup-java-env/action.yml: Fix typo "yetserday" → "yesterday" in cache description comment
• contributor-docs/cicd.md: Fix "IT's" → "ITs" (plural, not possessive) and update common-flags.go line reference from #L32 to #L25 (aliases
  moved after recent additions)

How to validate

1. Check that common-flags.go#L25 correctly points to the start of the alias constants block
2. Verify the typo and grammar fixes are correct

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on improving the quality and accuracy of the project's documentation. By addressing minor typos and updating stale code references, the changes ensure that contributors have reliable information when navigating the CI/CD configuration and setup processes.

Highlights

• Documentation Cleanup: Corrected spelling errors and improved grammatical accuracy within CI/CD documentation files.
• Reference Updates: Updated outdated line references in documentation to ensure links correctly point to the current codebase structure.

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