Update x64 build to Mac 14 (13 is now deprecated)

Author: pimterry

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
             os: "windows-2022"
           - platform: mac
             arch: x64
-            os: "macos-13"
+            os: "macos-14-large"
           - platform: mac
             arch: arm64
             os: "macos-14"