Enable CI for backport branch

Author: 197g

.github/workflows/rust.yml

@@ -2,9 +2,9 @@ name: Rust CI
 
 on:
  push:
- branches: [ main ]
+ branches: [ main, "version-0.25.8" ]
  pull_request:
- branches: [ main ]
+ branches: [ main, "version-0.25.8" ]
  schedule:
  - cron: '5 16 * * 6'