Simplify workflow

Author: Heliozoa

.github/workflows/test.yml

@@ -5,7 +5,6 @@ on:
     branches: [main, "[0-9]+.[0-9]+"]
   pull_request_target:
     branches: [main, "[0-9]+.[0-9]+"]
-    types: [opened, synchronize, reopened]
 
 env:
   RUST_LOG: debug,j4rs=warn