ci: bound the test job at 20 minutes

Author: mustafaahci

.github/workflows/ci.yml

@@ -22,6 +22,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest]
     runs-on: ${{ matrix.os }}
+    timeout-minutes: 20
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable