Use macOS 15 runner for builds to fix traffic light rendering

Author: ChristianChiarulli

.github/workflows/ci.yml

@@ -241,10 +241,10 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - platform: macos-latest
+          - platform: macos-15
             args: --target aarch64-apple-darwin
             arch: aarch64
-          - platform: macos-latest
+          - platform: macos-15
             args: --target x86_64-apple-darwin
             arch: x86_64
           - platform: ubuntu-22.04