Use newer macos runners (#49)

Author: djmitche

.github/workflows/ci.yml

@@ -118,9 +118,9 @@ jobs:
     strategy:
       matrix:
         platform:
-          - runner: macos-13
+          - runner: macos-26-intel
             target: x86_64
-          - runner: macos-14
+          - runner: macos-26
             target: aarch64
     steps:
       - uses: actions/checkout@v4