[rust] Enable tests in GitHub Actions on Linux arm64

Now that GitHub-hosted Linux arm64 runners are available,
we can start using them to test the Selenium Manager code.

Author: dennisameling

.github/workflows/ci-rust.yml

@@ -35,6 +35,7 @@ jobs:
         include:
           - os: macos
           - os: ubuntu
+          - os: ubuntu-24.04-arm
           - os: windows
     with:
       name: Tests (${{ matrix.os }})