Disable mac tests

Need to work out how to select a newer version of Xcode to use Swift 6.1

Author: danielctull

.github/workflows/ci.yml

@@ -26,15 +26,15 @@ jobs:
     - name: Test
       run: swift test -v
 
-  macos:
-    name: macOS
-    runs-on: macos-15
-    steps:
-    - name: Checkout
-      uses: actions/checkout@v4
-    - name: Swift Version
-      run: swift --version
-    - name: Build
-      run: swift build -v
-    - name: Test
-      run: swift test -v
+#  macos:
+#    name: macOS
+#    runs-on: macos-15
+#    steps:
+#    - name: Checkout
+#      uses: actions/checkout@v4
+#    - name: Swift Version
+#      run: swift --version
+#    - name: Build
+#      run: swift build -v
+#    - name: Test
+#      run: swift test -v