Remove indentation for bullet list

This commit removes the unnecessary indentation of the bullet list in
the releasenote. It causes weird rendering on the web page.

 https://docs.openstack.org/releasenotes/tempest/unreleased.html#relnotes-23-0-0

Change-Id: I146a9c8a74227aa1810e0a02d7cb6a91fbe4da08
diff --git a/releasenotes/notes/intermediate-ussuri-release-8aebeca312a6718c.yaml b/releasenotes/notes/intermediate-ussuri-release-8aebeca312a6718c.yaml
index 6caeacd..56f160a 100644
--- a/releasenotes/notes/intermediate-ussuri-release-8aebeca312a6718c.yaml
+++ b/releasenotes/notes/intermediate-ussuri-release-8aebeca312a6718c.yaml
@@ -1,12 +1,12 @@
 ---
-prelude: >
+prelude: |
     This is an intermediate release during the Ussuri development cycle to
     mark the end of support for EM Queens in Tempest.
     After this release, Tempest will support below OpenStack Releases:
 
-      * Train
-      * Stein
-      * Rocky
+    * Train
+    * Stein
+    * Rocky
 
     Current development of Tempest is for OpenStack Ussuri development
     cycle.