Fix indentation in releasenotes

This commit fixes indentations in releasenotes. Due to the indentations,
the html contents are rendered as block quotes which is awkward.

Change-Id: Ia9f271ead6a6e3fb90afc935771e8da4d8990c3c
diff --git a/releasenotes/notes/intermediate-train-release-0146c624cff9a57f.yaml b/releasenotes/notes/intermediate-train-release-0146c624cff9a57f.yaml
index 6977e12..7940846 100644
--- a/releasenotes/notes/intermediate-train-release-0146c624cff9a57f.yaml
+++ b/releasenotes/notes/intermediate-train-release-0146c624cff9a57f.yaml
@@ -1,12 +1,12 @@
 ---
-prelude: >
+prelude: |
     This is an intermediate release during the Train development cycle to
     mark the end of support for Pike in Tempest.
     After this release, Tempest will support below OpenStack Releases:
 
-      * Stein
-      * Rocky
-      * Queens
+    * Stein
+    * Rocky
+    * Queens
 
     Current development of Tempest is for OpenStack Train development
     cycle.