Update changelog.

Changelog.md

@@ -11,6 +11,11 @@ Breaking changes
 
 New
 
+* The `chain_validity` value in the `jsonext` format now considers the
+  validity of the manifest’s EE certificates. A new `stale` value shows
+  the time when any of the publication points along the way will become
+  stale. ([#945])
+
 Bug fixes
 
 * Fixed an issue where the refresh time was calculated as zero under
@@ -25,6 +30,7 @@ Other changes
 [#907]: https://github.com/NLnetLabs/routinator/pull/907
 [#940]: https://github.com/NLnetLabs/routinator/pull/940
 [#942]: https://github.com/NLnetLabs/routinator/pull/942
+[#945]: https://github.com/NLnetLabs/routinator/pull/945
 
 
 ## 0.13.2 ‘Existential Funk’