Update CI.yaml

Author: baseplate-admin

.github/workflows/CI.yaml

@@ -117,9 +117,9 @@ jobs:
     strategy:
       matrix:
         platform:
-          - runner: macos-13
+          - runner: macos-15
             target: x86_64
-          - runner: macos-14
+          - runner: macos-15
             target: aarch64
     steps:
       - uses: actions/checkout@v4
@@ -206,3 +206,4 @@ jobs:
           uv run pytest -v -x -rs
 
 
+