Update license_header_check_project_name in workflow

Author: MaxDesiatov

.github/workflows/pull_request.yml

@@ -15,4 +15,4 @@ jobs:
     uses: swiftlang/github-workflows/.github/workflows/soundness.yml@main
     with:
       api_breakage_check_enabled: false
-      license_header_check_project_name: "Swift.org"
+      license_header_check_project_name: "Swift"