Fix link to native extensions deprecation issue

Follow-up to bda70c84892923769c40a131886d6e70fadc99cb

Change-Id: I76f042a08a6d313bfdee297b078e01fd81784b97
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/212545
Auto-Submit: Kevin Moore <kevmoo@google.com>
Reviewed-by: Slava Egorov <vegorov@google.com>
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7233909..2c7f285 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -89,9 +89,9 @@
 
 #### Dart VM
 
-- **Breaking Change** [#45451][]: Support for `dart-ext:`-style native
-  extensions has been removed as previously announced. Use `dart:ffi` to bind
-  to native libraries instead.
+- **Breaking Change** [#45451](https://github.com/dart-lang/sdk/issues/45451) :
+  Support for `dart-ext:`-style native extensions has been removed as previously
+  announced. Use `dart:ffi` to bind to native libraries instead.
 
 ## 2.14.0