Update changelog

Signed-off-by: divyansh42 <diagrawa@redhat.com>

Author: divyansh42

CHANGELOG.md

@@ -1,5 +1,8 @@
 # chart-verifier CHANGELOG
 
+## v1.3
+- Update action to run on Node20. https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/
+
 ## v1.2
 - Update action to run on Node16. https://github.blog/changelog/2022-05-20-actions-can-now-run-in-a-node-js-16-runtime/