Update CI runners (#654)

Author: straight-shoota

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-22.04, macos-12]
+        os: [ubuntu-24.04, macos-13, macos-14]
         crystal: [latest, nightly]
         include:
           - os: windows-2022