Update version to v3.11.0-beta8

[DanielZhao0432]

Update version to v3.11.0-beta8.

[github-actions]

Agent Governance Check

Severity	Rule	Location	Reason	Suggested action	Exception
warning	PR metadata completeness	pull_request.body	missing sections: Linked Issue, Unit Tests and/or Case Tests for my changes, What's changed?	Fill the PR template with issue linkage, test evidence, and a concise change summary.	allowed
warning	Test evidence review	pull_request.body	Source code changed without test path changes or PR test evidence.	Add focused tests, update a relevant case, or document why tests are not required.	allowed
warning	Documentation sync review	pull_request.body	Source changes have no docs change or explicit no-docs-needed statement.	Add documentation updates for behavior/interface changes, or state why documentation is not required.	allowed