docs/data-modeling: Adding compareDateRange example

[EduardoGHdez]

Check List

• [ ] ~Tests has been run in packages where changes made if available~
• [ ] ~Linter has been run for changed code~
• [ ] ~Tests for the changes have been added if not covered yet~
• [x] Docs have been added / updated if required

Issue Reference this PR resolves N/A

Description of Changes Made (if issue reference is not provided) While reading the docs, it took me a few searches to figure out how to make use of the compareDateRange functionality through plain REST API. Just thought on adding an example for quick reference, but kept the references to the Comparing Data over Different Time Periods blogpost