Update CHANGELOG-0.10.md with latest changes

Author: hihilla

CHANGELOG-0.10.md

@@ -49,6 +49,8 @@
   all releases. This fixes an issue where users would modify this
   field and cause an unsupported behavior ([#357][])
 * Fix dropping pods when moving back in the strategy([#387][])
+* Webhook validates deletion. This prevents users to delete release 
+  objects when there's a rollout block thus creating an outage for their service ([#392][])
 
 ### Migrating to 0.10
 
@@ -83,4 +85,5 @@
 [#380]: https://github.com/bookingcom/shipper/pull/380
 [#383]: https://github.com/bookingcom/shipper/pull/383
 [#387]: https://github.com/bookingcom/shipper/pull/387
+[#392]: https://github.com/bookingcom/shipper/pull/392
 [failure policy]: https://kubernetes.io/docs/reference/access-authn-authz/extensible-admission-controllers/#failure-policy