Remove change log note

Change-Id: Icebb3b7d65e9821b748babcb89bdc4fbb95d1997

CHANGELOG.md

@@ -1,16 +1,11 @@
 Release notes
 =============
 
-Note, that this changelog describes only the changes relevant from the
-perspective of the Registry API client implementers, and users which view the
-public Registry Service site. Most changes made to the Registry Service touch
-the *unofficial* services - such as the document validator, or Echo API
-validator - but these changes are currently not mentioned in this changelog, to
-avoid clutter.
-
 1.9.0
 -----
 
+*Released on 2022-06-01*
+
 * AbstractValidationSuite: added serialVersionUID to InvalidNumberOfApiEntries.
 * Updated Jgit dependency (4.4.0 -> 4.11.9).
 * Updated BouncyCastle dependency (1.57 -> 1.70).