I wouldn't be so sure. While the assets are free on the Unity Asset Store, that doesn't mean you're allowed to redistribute them. Which is exactly what you'd do if you give others access to the project files, as is required in this specific game jam. Note that there's a significant difference between using free assets within a compiled game or sharing them within the source files.
See this post: https://itch.io/jam/gamedevtv-jam-2022/topic/2087635/open-source-unity-asset-sto...