Update CI equipments and drop Xcode 15 support (#1548)

Author: giginet

.github/workflows/ci.yml

@@ -4,16 +4,11 @@ on:
   pull_request: {}
 jobs:
   run:
-    runs-on: ${{ matrix.macos }}
+    runs-on: macos-15
     name: Xcode ${{ matrix.xcode }}
     strategy:
       matrix:
-        xcode: ["15.4", "16.0"]
-        include:
-        - xcode: "15.4"
-          macos: macos-15
-        - xcode: "16.0"
-          macos: macos-15
+        xcode: ["16.0", "16.3"]
     env:
       DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer
     steps: