doc: fix "Title underline too short" warning

Signed-off-by: Kefu Chai <kchai@redhat.com>

diff --git a/doc/release-notes.rst b/doc/release-notes.rst
index 4dae49cae361a8e91f76ab5d8b8377cf966308e2..30d3b6c8e0c8b8944fa9e5c2f8644ad206ecffdf 100644 (file)
--- a/doc/release-notes.rst
+++ b/doc/release-notes.rst
@@ -5100,7 +5100,7 @@ Notable Changes
 
 
 v0.67.12 "Dumpling" (draft)
-===================
+===========================
 
 This stable update for Dumpling fixes a few longstanding issues with
 backfill in the OSD that can lead to stalled IOs.  There is also a fix