Fix: Update CHANGELOG.md

Author: localheinz

CHANGELOG.md

@@ -6,6 +6,13 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## Unreleased
 
-For a full diff see [`1902cc2...main`][1902cc2...main].
+For a full diff see [`1.0.0...main`][1.0.0...main].
 
-[1902cc2...main]: https://github.com/ergebnis/day-one-to-obsidian-converter/compare/1902cc2...main
+## [`1.0.0`][1.0.0]
+
+For a full diff see [`0c20292...1.0.0`][0c20292...1.0.0].
+
+[1.0.0]: https://github.com/ergebnis/day-one-to-obsidian-converter/releases/tag/1.0.0
+
+[0c20292...1.0.0]: https://github.com/ergebnis/day-one-to-obsidian-converter/compare/0c20292...1.0.0
+[1.0.0...main]: https://github.com/ergebnis/day-one-to-obsidian-converter/compare/1.0.0...main