Update changelog for 1.0.5

CHANGELOG.md

+## v1.0.5
+
+### Bug
+
+- Avoid node.save to prevent incomplete attribute collections
+- `dist-ossec-keys.sh` should be sorted for idempotency
+
+### Improvement
+
+- Ability to disable ossec configuration template
+- Support for encrypted databags
+- Support for environment-scoped searches
+- Support for multiple email_to addresses
+
 ## v1.0.4
 
 ### Bug