ensure macos version within .github/workflows/pr.yaml have up to date versions

Author: harryswift01

.github/workflows/pr.yaml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-24.04, macos-14, windows-2025]
+        os: [ubuntu-24.04, macos-15, windows-2025]
         python-version: ["3.12", "3.13", "3.14"]
     steps:
       - name: Checkout