Update CHANGES

* Fix false positive with `content_tag` in newer Rails

Author: presidentbeef

CHANGES.md

@@ -1,11 +1,12 @@
-# Unreleased
+# 6.0.0 - 2023-05-24
 
 * Add obsolete fingerprints to comparison report
 * Warn about missing CSRF protection when defaults are not loaded (Chris Kruger)
 * Scan directories that include the word `public`
 * Raise minimum Ruby version to 3.0
 * Drop support for Ruby 1.8/1.9 syntax
 * Fix end-of-life dates for Ruby
+* Fix false positive with `content_tag` in newer Rails
 
 # 5.4.1 - 2023-02-21