Update CHANGES.md to mention breakign change around ProcessContext

[stankiewicz]

discusses revert that was done here #36523

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[gemini-code-assist]

Summary of Changes

Hello @stankiewicz, 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 updating the project's CHANGES.md file to accurately document a recent breaking change within the Java SDK. The update informs users about the deprecation and removal of the ProcessContext.outputWindowedValue method, guiding them towards the OutputReceiver's builder as the new standard for managing element metadata like offset and record IDs. This ensures that the project's change log remains current and provides clear guidance for developers adapting to API modifications.

Highlights

• Documentation Update: The CHANGES.md file has been updated to reflect a recent breaking change in the Java SDK.
• Breaking Change Noted: Specifically, the removal of the ProcessContext.outputWindowedValue method (introduced in 2.68) is now documented. Users are advised to use OutputReceiver's builder for setting offset and record IDs.

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[stankiewicz]

R: @Abacn

[github-actions]

Stopping reviewer notifications for this pull request: review requested by someone other than the bot, ceding control. If you'd like to restart, comment assign set of reviewers

[Abacn]

thanks!