Fix Flaky Test SearchTimeoutIT.testSimpleTimeout

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

server/src/internalClusterTest/java/org/opensearch/search/SearchTimeoutIT.java

@@ -82,7 +82,7 @@ protected Settings nodeSettings(int nodeOrdinal) {
     }
 
     public void testSimpleTimeout() throws Exception {
-        final int numDocs = 1000;
+        final int numDocs = 10;
         for (int i = 0; i < numDocs; i++) {
             client().prepareIndex("test").setId(Integer.toString(i)).setSource("field", "value").get();
         }