Downloading for free from unofficial sites is illegal and carries significant security risks, including malware and potential account bans. The only legitimate way to access the Deluxe Edition and its specific updates like v1.08 is through official digital storefronts. Official Ways to Get Elden Ring
If you are looking for specifically, it was a major free update released in December 2022. It includes: Elden Ring Products - Bandai Namco Store ELDEN RING DOWNLOAD FREE V1.08 (DELUXE EDITION)
and Xbox Store : Official consoles stores for digital versions. What is in Version 1.08? Downloading for free from unofficial sites is illegal