Set Gerrit to 3.2.0-rc3

Change-Id: Ie134e0d32aeef9f045c377431b9be98326d7a235
diff --git a/gerrit/Dockerfile b/gerrit/Dockerfile
index a20c8b0..f8bfcd5 100644
--- a/gerrit/Dockerfile
+++ b/gerrit/Dockerfile
@@ -1,4 +1,4 @@
-FROM gerritcodereview/gerrit:3.2.0-rc2-centos8
+FROM gerritcodereview/gerrit:3.2.0-rc3-centos8
 
 USER root