[DOC]: Fix docstring defaults for query filters

[hesreallyhim]

Description of changes

The docstrings for where and where_document indicated that they default to {}. This is inconsistent with the actual type definition, and additionally confusing because sending None is OK, but sending {} is not.

So, this is a small find-and-replace for these instances.

NOTE

This also comes up with respect to the headers in the Docs site regarding the HTTP Client. In this case, the docs are clearly inconsistent with the code right above it, but I wasn't sure if I should change it, because None gets converted to {} in sending the request. I'm still inclined to correct it to match the actual code.

Test plan

How are these changes tested?

• Tests pass locally with pytest for python, yarn test for js, cargo test for rust

Documentation Changes

Are all docstrings for user-facing APIs updated if required? Do we need to make documentation changes in the docs repository?

[github-actions]

Reviewer Checklist

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Testing, Bugs, Errors, Logs, Documentation

• Can you think of any use case in which the code does not behave as intended? Have they been tested?
• Can you think of any inputs or external events that could break the code? Is user input validated and safe? Have they been tested?
• If appropriate, are there adequate property based tests?
• If appropriate, are there adequate unit tests?
• Should any logging, debugging, tracing information be added or removed?
• Are error messages user-friendly?
• Have all documentation changes needed been made?
• Have all non-obvious changes been commented?

System Compatibility

• Are there any potential impacts on other parts of the system or backward compatibility?
• Does this change intersect with any items on our roadmap, and if so, is there a plan for fitting them together?

Quality

• Is this code of a unexpectedly high quality (Readability, Modularity, Intuitiveness)