HBASE-27505 [hbase-thirdparty] Set updatePomFile for maven-flatten-plugin (#97)

Signed-off-by: Duo Zhang <zhangduo@apache.org>
diff --git a/pom.xml b/pom.xml
index 92f5171..329000d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -356,6 +356,7 @@
         <version>1.3.0</version>
         <configuration>
           <embedBuildProfileDependencies>true</embedBuildProfileDependencies>
+          <updatePomFile>true</updatePomFile>
         </configuration>
         <executions>
           <!-- enable flattening -->