chore: update changelog for 2.12.7 (#6719)

Signed-off-by: Jintao Zhang <[email protected]>

CHANGELOG.md

@@ -7,6 +7,7 @@ Adding a new version? You'll need three changes:
 * Add the diff link, like "[2.7.0]: https://github.com/kong/kubernetes-ingress-controller/compare/v1.2.2...v1.2.3".
   This is all the way at the bottom. It's the thing we always forget.
 --->
+ - [2.12.7](#2127)
  - [2.12.6](#2126)
  - [2.12.5](#2125)
  - [2.12.4](#2124)
@@ -81,7 +82,9 @@ Adding a new version? You'll need three changes:
  - [0.0.5](#005)
  - [0.0.4 and prior](#004-and-prior)
 
-## Unreleased
+## [2.12.7]
+
+> Release date: 2024-11-25
 
 ### Fixed
 
@@ -2901,6 +2904,7 @@ Please read the changelog and test in your environment.
  - The initial versions  were rapildy iterated to deliver
    a working ingress controller.
 
+[2.12.7]: https://github.com/kong/kubernetes-ingress-controller/compare/v2.12.6..v2.12.7
 [2.12.6]: https://github.com/kong/kubernetes-ingress-controller/compare/v2.12.5..v2.12.6
 [2.12.5]: https://github.com/kong/kubernetes-ingress-controller/compare/v2.12.4..v2.12.5
 [2.12.4]: https://github.com/kong/kubernetes-ingress-controller/compare/v2.12.4..v2.12.3