Fix victoria releasenote to align yaml format

This commit fixes the victoria releasenote to align the yaml format.

Change-Id: I192965c0b6a5567a392c810df430e27f414963a3
diff --git a/releasenotes/notes/tempest-victoria-release-27000c02edc5a112.yaml b/releasenotes/notes/tempest-victoria-release-27000c02edc5a112.yaml
index bb91213..574f6d9 100644
--- a/releasenotes/notes/tempest-victoria-release-27000c02edc5a112.yaml
+++ b/releasenotes/notes/tempest-victoria-release-27000c02edc5a112.yaml
@@ -1,3 +1,4 @@
+---
 prelude: |
     This release is to tag the Tempest for OpenStack Victoria release.
     This release marks the start of Victoria release support in Tempest.