ci: Disable api breakage check for now.

Author: scottmarchant

.github/workflows/pull_request.yml

@@ -10,6 +10,7 @@ jobs:
     uses: swiftlang/github-workflows/.github/workflows/soundness.yml@main
     with:
       license_header_check_project_name: "Swift.org"
+      api_breakage_check_enabled: false
 
   tests:
     name: tests