Update the type of "default" in ParamField to be "any"

[mycho2003]

Documentation changes

In https://github.com/mintlify/mint/pull/3545, the type of "default" in ParamField was changed to "any". This updates the docs to reflect this.

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[ethanpalm]

lgtm!

safe to ignore the failing check. It's based on the recent update to the contextual menu and should deploy just fine to production