update icp ecosystem

[marc0olo]

hey @yizhao-ec,
can you please review this update? thanks!

[yizhao-ec]

Thanks for your contribution to PR #2468.

I've reviewed the additions and found:

• https://github.com/jonathanbelolo/composable-rust: This appears to be a general-purpose Rust framework for event-driven backend systems, with no discernible connection to the Internet Computer.
• The Juno ecosystem you are looking for is probably junobuild https://opendevdata.org/taxonomy#junobuild rather than the current Juno

[marc0olo]

@yizhao-ec thanks, I removed https://github.com/jonathanbelolo/composable-rust and also the Juno entries as the repo to be added is already existing: https://opendevdata.org/taxonomy#repo:junobuild/observatory-templates