Update 1.6.KSB_K8s_install_Guide.md

manual1903/1.6.KSB_K8s_install_Guide.md

@@ -689,7 +689,7 @@ Backup/Checkpoint node  | 50105 | dfs.backup.http.address
 Tasktrackers            | 50060 | mapred.task.tracker.http.address
 Jobracker               | 50030 | mapred.job.tracker.http.address
 
-###5. 쿠버네티스 kubectl 명령 alias 방법
+### 5. 쿠버네티스 kubectl 명령 alias 방법
 ```sh
 echo "alias k=kubectl" >> ~/.bashrc
 source <(kubectl completion bash | sed s/kubectl/k/g)