Merge pull request #10131 from Ardagan/LowerExamplesTimeout

Reduce Java Examples Dataflow Precommit timeout
diff --git a/.test-infra/jenkins/job_PreCommit_Java_Examples_Dataflow.groovy b/.test-infra/jenkins/job_PreCommit_Java_Examples_Dataflow.groovy
index 7855085..e4c17ca 100644
--- a/.test-infra/jenkins/job_PreCommit_Java_Examples_Dataflow.groovy
+++ b/.test-infra/jenkins/job_PreCommit_Java_Examples_Dataflow.groovy
@@ -30,7 +30,8 @@
       '^examples/java/.*$',
       '^examples/kotlin/.*$',
       '^release/.*$',
-    ]
+    ],
+    timeoutMins: 30,
 )
 builder.build {
   publishers {