Update pull_request.yml to not use Amazon Linux 2 and update the tag for debian12

Author: shahmishal

.github/workflows/pull_request.yml

@@ -9,7 +9,7 @@ jobs:
     name: Test
     uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main
     with:
-      linux_os_versions: '["amazonlinux2", "noble", "jammy", "focal", "rhel-ubi9", "bookworm"]'
+      linux_os_versions: '["noble", "jammy", "focal", "rhel-ubi9", "debian12"]'
       linux_swift_versions: '["6.1", "nightly-main"]'
       linux_build_command: 'swift build'
       windows_swift_versions: '["6.1", "nightly-main"]'