changelog for: fix typo related to collection delete hook

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## 3.5.9.dev
 * Extend: [auth] add support for type http_remote_user
 * Extend: logging of invalid sync-token with user, path, remote host and useragent
+* Fix: typo related to collection delete hook
 
 ## 3.5.8
 * Extend: [auth] re-factor & overhaul LDAP authentication, especially for Python's ldap module