games/veloren-weekly: Fix build with rust 1.75.0

error[E0557]: feature has been removed
--> rtsim/src/lib.rs:5:5

|

5 | generators,

|     ^^^^^^^^^^ feature has been removed
|
= note: renamed to `coroutines`

error[E0635]: unknown feature generator_trait
--> rtsim/src/lib.rs:4:5

|

4 | generator_trait,

PR: 276033
Approved by: portmgr (build fix blanket)

(cherry picked from commit d0c14d04136e43828d0c8184efc8d9105c9fd502)