[xen stable-4.15] CHANGELOG: Correct sub-section headings

[patchbot@xxxxxxx]

commit 0f93d79a97121c55d3f3e26304d437ddb38de6a7
Author:     Ian Jackson <iwj@xxxxxxxxxxxxxx>
AuthorDate: Wed Mar 24 16:30:30 2021 +0000
Commit:     Ian Jackson <iwj@xxxxxxxxxxxxxx>
CommitDate: Wed Mar 24 16:31:32 2021 +0000

    CHANGELOG: Correct sub-section headings
    
    Signed-off-by: Ian Jackson <iwj@xxxxxxxxxxxxxx>
---
 CHANGELOG.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c407f6bb2f..07f240b6ab 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,12 +6,12 @@ The format is based on [Keep a 
Changelog](https://keepachangelog.com/en/1.0.0/)
 
 ## [4.15.0 
UNRELEASED](https://xenbits.xen.org/gitweb/?p=xen.git;a=shortlog;h=RELEASE-4.15.0)
 - TBD
 
-## Added / support upgraded
+### Added / support upgraded
  - ARM IOREQ servers (device emulation etc.) (Tech Preview)
  - Renesas IPMMU-VMSA (Supported, not security supported; was Tech Preview)
  - ARM SMMUv3 (Tech Preview)
 
-## Removed / support downgraded
+### Removed / support downgraded
 
  - qemu-xen-traditional as host process device model, now "No security
    support, not recommended".  (Use as stub domain device model is still
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.15