[xen staging] CHANGELOG.md: Set release date for 4.21

[patchbot@xxxxxxx]

commit f5535728b66cf177cdfb55b85328a86d21b4c522
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Tue Nov 18 16:45:34 2025 +0000
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Tue Nov 18 17:51:13 2025 +0000

    CHANGELOG.md: Set release date for 4.21
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
---
 CHANGELOG.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c9932a2af0..adaad5ee89 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,7 +12,7 @@ The format is based on [Keep a 
Changelog](https://keepachangelog.com/en/1.0.0/)
 
 ### Removed
 
-## [4.21.0 
UNRELEASED](https://xenbits.xenproject.org/gitweb/?p=xen.git;a=shortlog;h=staging)
 - TBD
+## 
[4.21.0](https://xenbits.xenproject.org/gitweb/?p=xen.git;a=shortlog;h=RELEASE-4.21.0)
 - 2025-11-19
 
 ### Changed
  - The minimum toolchain requirements have increased for some architectures:
--
generated by git-patchbot for /home/xen/git/xen.git#staging