[FLINK-34034][docs] Update the query hint docs to clarify the resolution of conflicts in kv hint and list hint

[swuferhong]

What is the purpose of the change

This pr is aims to update the query hint docs to clarify the resolution of conflicts in kv hint and list hint.

Brief change log

• update the query hint docs to clarify the resolution of conflicts in kv hint and list hint.

Verifying this change

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): no
• The public API, i.e., is any changed class annotated with @Public(Evolving): no
• The serializers: no
• The runtime per-record code paths (performance sensitive): no
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
• The S3 file system connector:no

Documentation

• Does this pull request introduce a new feature? no
• If yes, how is the feature documented? docs

[flinkbot]

CI report:

• 7ba764c2019295f0b13adbce21a3bc03800a20e0 Azure: SUCCESS

Bot commands

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• @flinkbot run azure re-run the last Azure build

[swuferhong]

@flinkbot run azure