[Documentation] Clarify the `zoom` requirement in the `ll` parameter in Google Maps API

[marm123]

Currently, our documentation states that the zoom parameter is optional, while in fact it is required in the ll parameter. The ll parameter is optional itself, but if used, it needs to contain the zoom value as well.

Current state:

Error when searching without the zoom part of the ll parameter:

Google Maps ll parameter documentation

[schaferyan]

Good idea @marm123. As an additional note, customers sometimes mistakenly think zoom is its own parameter. We can clarify this as well.

[dsojevic]

The documentation has been updated to better clarify this: Google Maps ll parameter documentation

The page now also includes an informational box at the top to give further detail on it: Note on Geographic Location and Search Queries