[xen staging] CHANGELOG.md: Start a new 4.21 section

[patchbot@xxxxxxx]

commit e16acd80674002cbc6b51626e826bd6f9f624a63
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Fri Feb 21 14:53:57 2025 +0000
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Fri Feb 21 14:55:13 2025 +0000

    CHANGELOG.md: Start a new 4.21 section
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 CHANGELOG.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1de1d1eca1..1979166820 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,14 @@ Notable changes to Xen will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
+## [4.21.0 
UNRELEASED](https://xenbits.xenproject.org/gitweb/?p=xen.git;a=shortlog;h=staging)
 - TBD
+
+### Changed
+
+### Added
+
+### Removed
+
 ## [4.20.0 
UNRELEASED](https://xenbits.xenproject.org/gitweb/?p=xen.git;a=shortlog;h=staging)
 - TBD
 
 ### Changed
--
generated by git-patchbot for /home/xen/git/xen.git#staging