tweak QueryParameters type in index.d.ts to better match arbitrary object types #19191

Description:

This avoids typescript errors when casting certain arbitrary objects to the QueryParameters type. I was specifically having trouble with this one:

{
  example: string;
  name: string;
  types: {
    name: string;
    value: string;
  }[];
  value: string;
}[]

Review

• [ ] Functional review done
• [ ] Potential edge cases thought about (behavior of the code with strange input, with strange internal state or possible interactions with other Matomo subsystems)
• [ ] Usability review done (is anything maybe unclear or think about anything that would cause people to reach out to support)
• [ ] Security review done
• [ ] Wording review done
• [ ] Code review done
• [ ] Tests were added if useful/possible
• [ ] Reviewed for breaking changes
• [ ] Developer changelog updated if needed
• [ ] Documentation added if needed
• [ ] Existing documentation updated if needed