Ymal blocks miss 'yaml'

Signed-off-by: yuandongx <[email protected]>

Author: yuandongx

content/zh/docs/concepts/workloads/controllers/job.md

@@ -731,7 +731,7 @@ kubectl get job old -o yaml
 
 输出类似于：
 
-```
+```yaml
 kind: Job
 metadata:
   name: old
@@ -758,7 +758,7 @@ the selector that the system normally generates for you automatically.
 你需要在新 Job 中设置 `manualSelector: true`，因为你并未使用系统通常自动为你
 生成的选择算符。 
 
-```
+```yaml
 kind: Job
 metadata:
   name: new