Update Properties documentation with new Optimizer property

Description

Documentation update for new confidenceBasedBroadcasting property

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[ ] PR description addresses the issue accurately and concisely. If the change is non-trivial, a GitHub Issue is referenced.
[ ] Documented new properties (with its default value), SQL syntax, functions, or other functionality.
[ ] If release notes are required, they follow the release notes guidelines.
[ ] Adequate tests were added if applicable.
[ ] CI passed.

== NO RELEASE NOTE ==