Merge pull request #28420 from HongjiangHuang/install-kubectl-notes-zh

[zh]: Add PATH note for install macos kubectl

content/zh/docs/tasks/tools/install-kubectl-macos.md

@@ -169,6 +169,13 @@ The following methods exist for installing kubectl on macOS:
    sudo chown root: /usr/local/bin/kubectl
    ```
 
+   {{< note >}}
+   <!--
+   Make sure `/usr/local/bin` is in your PATH environment variable.
+   -->
+   确保 `/usr/local/bin` 在你的 PATH 环境变量中。
+   {{< /note >}}
+
 <!-- 
 1. Test to ensure the version you installed is up-to-date:
 -->