ci: pangolin 的 runs-on 从 nas 统一改为 mac

runner 命名/标签统一:mac-pangolin-2 是跑在 Mac 上的个人级 runner,原来挂
`nas` 标签(历史上按"理想归宿是 NAS Linux runner"预留),命名与实体不符、
易混。现把 runner 标签改为 `mac`(个人级不变,仍服务名下所有仓库),并把
pangolin 全部 workflow 的 `runs-on: nas` → `runs-on: mac` 对齐(ci.yml 9 个
job + 解释注释、deploy-client.yml 4 个 job)。与 jiu 的 `runs-on: mac` 统一,
一个个人级 mac runner 即可服务两边。ci-runner.md 标签引用同步更新。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.gitea/workflows/deploy-client.yml

@@ -34,7 +34,7 @@ concurrency:
 
 jobs:
   build-android:
-    runs-on: nas
+    runs-on: mac
     env:
       GOPROXY: https://goproxy.cn,direct
       PUB_HOSTED_URL: https://pub.flutter-io.cn
@@ -106,7 +106,7 @@ jobs:
   #      simply picks up whatever artifacts DO exist — an absent "macos"
   #      artifact is not an error there.
   build-macos:
-    runs-on: nas
+    runs-on: mac
     continue-on-error: true
     env:
       PUB_HOSTED_URL: https://pub.flutter-io.cn
@@ -137,7 +137,7 @@ jobs:
           path: dist/
 
   build-ios:
-    runs-on: nas
+    runs-on: mac
     continue-on-error: true
     env:
       PUB_HOSTED_URL: https://pub.flutter-io.cn
@@ -168,7 +168,7 @@ jobs:
   # (对应平台下载保留 pangolin1 上一版,待可用时下个 client-v* 追上)。
   release-deploy:
     needs: [build-android]
-    runs-on: nas
+    runs-on: mac
     steps:
       - name: Checkout
         uses: actions/checkout@v4