Since macos-13 test image are retired, move on to macos-15 by github advise

Author: Coldwings

.github/workflows/ci.macos.arm.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   macOS14-arm:
-    runs-on: macos-14
+    runs-on: macos-15
 
     steps:
       - uses: szenius/set-timezone@v2.0

.github/workflows/ci.macos.x86_64.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   macOS13-x86:
-    runs-on: macos-13
+    runs-on: macos-15
 
     steps:
       - uses: szenius/set-timezone@v2.0