Fix documentation

Asciidoctor is more picky than asciidoc, that the section title must
have exactly the same length of section characters under them.

Change-Id: Id3843f91633a25d6c080cc0a80020ca7fc5b076a
diff --git a/Documentation/database-setup.txt b/Documentation/database-setup.txt
index b1561cb..3800473 100644
--- a/Documentation/database-setup.txt
+++ b/Documentation/database-setup.txt
@@ -108,3 +108,8 @@
 [database]
         password = secret_pasword
 ----
+
+
+GERRIT
+------
+Part of link:index.html[Gerrit Code Review]