Add Prestyj Statistics Dataset under Data

[Gahroot]

Adds one line to the ## Data section pointing to the Prestyj Statistics CSV — 58 cite-worthy stats on lead response, video ad performance, AI adoption in sales, and CPL by industry.

• Direct CSV: https://prestyj.com/data/statistics.csv
• JSON variant: https://prestyj.com/data/statistics.json
• Landing page with schema.org/Dataset markup: https://prestyj.com/data
• License: CC BY 4.0 (attribution required)
• Mirror repo: https://github.com/Gahroot/prestyj-statistics-dataset

Each row carries its primary publisher (HBR, InsideSales, Wyzowl, HubSpot, WordStream, McKinsey, Gartner, Salesforce, etc.), publication year, and a stable permalink. Useful for anyone working with CSV-formatted marketing/sales research data.

No duplicate of an existing entry. Placed at the end of the Data section per list convention.