Bump up Gerrit version

Change-Id: I6a7d8d19b1f375b9def0262d862487c5ffcf2ef7
diff --git a/gerrit/Dockerfile b/gerrit/Dockerfile
index 58a7226..5d27f6c 100644
--- a/gerrit/Dockerfile
+++ b/gerrit/Dockerfile
@@ -1,4 +1,4 @@
-FROM gerritcodereview/gerrit:3.2.0-rc1-centos8
+FROM gerritcodereview/gerrit:3.2.0-rc2-centos8
 
 USER root