Update pull_request.yml

Author: MaxDesiatov

.github/workflows/pull_request.yml

@@ -10,7 +10,7 @@ jobs:
     uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main
     with:
       linux_os_versions: '["amazonlinux2", "bookworm", "noble", "jammy", "focal", "rhel-ubi9"]'
-      linux_swift_versions: '["6.0", "6.1", "nightly-6.2", "nightly-main"]'
+      linux_swift_versions: '["5.10", "6.0", "6.1", "nightly-6.2", "nightly-main"]'
       linux_pre_build_command: |
         if command -v apt-get >/dev/null 2>&1 ; then # bookworm, noble, jammy, focal
           apt-get update -y