[hotfix][docs] Fix output of test job

Previously, the output listed here was the one for `head` and not `tail`
as it's described in the steps to execute the test.

This closes apache#17261.

docs/content.zh/docs/try-flink/local_installation.md

@@ -77,12 +77,16 @@ Flink 的 Releases 附带了许多的示例作业。你可以任意选择一个
 ```bash
 $ ./bin/flink run examples/streaming/WordCount.jar
 $ tail log/flink-*-taskexecutor-*.out
-  (to,1)
-  (be,1)
-  (or,1)
-  (not,1)
-  (to,2)
-  (be,2)
+  (nymph,1)
+  (in,3)
+  (thy,1)
+  (orisons,1)
+  (be,4)
+  (all,2)
+  (my,1)
+  (sins,1)
+  (remember,1)
+  (d,4)
 ```
 
 另外，你可以通过 Flink 的 [Web UI](http://localhost:8081) 来监视集群的状态和正在运行的作业。