chore(deps): update dependency macos to v15 (#13646)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/deploy-v4-site.yml

@@ -11,7 +11,7 @@ on:
 jobs:
   build-and-deploy:
     if: github.repository == 'youzan/vant'
-    runs-on: macos-14
+    runs-on: macos-15
     steps:
       - name: Checkout 🛎️
         uses: actions/checkout@v5

.github/workflows/test.yml

@@ -34,7 +34,7 @@ jobs:
         run: npm run lint
 
   test:
-    runs-on: macos-14
+    runs-on: macos-15
     steps:
       - uses: actions/checkout@v5
 
@@ -61,7 +61,7 @@ jobs:
           directory: ./packages/vant/test/coverage
 
   build:
-    runs-on: macos-14
+    runs-on: macos-15
     steps:
       - uses: actions/checkout@v5