Use Xcode 16.4 on CI

Author: laevandus

.github/workflows/smoke-checks.yml

@@ -47,10 +47,10 @@ jobs:
 
   automated-code-review:
     name: Automated Code Review
-    runs-on: macos-14
+    runs-on: macos-15
     if: ${{ github.event.inputs.record_snapshots != 'true' }}
     env:
-      XCODE_VERSION: "16.1"
+      XCODE_VERSION: "16.4"
     steps:
     - uses: actions/[email protected]
     - uses: ./.github/actions/bootstrap
@@ -65,10 +65,10 @@ jobs:
 
   build-old-xcode:
     name: Build SDKs (Old Xcode)
-    runs-on: macos-14
+    runs-on: macos-15
     if: ${{ github.event.inputs.record_snapshots != 'true' }}
     env:
-      XCODE_VERSION: "16.1"
+      XCODE_VERSION: "16.4"
     steps:
     - name: Connect Bot
       uses: webfactory/[email protected]