Add changelog of v2.0.0

Author: CodeDoctorDE

CHANGELOG.md

@@ -2,6 +2,12 @@
 
 <!--ENTER CHANGELOG HERE-->
 
+## 2.0.0 (2023-12-24)
+
+Nothing changed from the nightly build to the stable release.
+
+See all changes since the last stable here: https://linwood.dev/butterfly/2.0.0-rc.3
+
 ## 2.0.0-rc.3 (2023-12-22)
 
 * Change duplicate icon to have a difference to copy icon ([#552](https://github.com/LinwoodDev/Butterfly/issues/552))

app/linux/debian/usr/share/metainfo/dev.linwood.butterfly.appdata.xml

@@ -39,6 +39,7 @@
 	</screenshots>
 	<launchable type="desktop-id">dev.linwood.butterfly.desktop</launchable>
 	<releases>
+		<release version="2.0.0" date="2023-12-24" />
 		<release version="1.6.1" date="2023-01-27" />
 		<release version="1.6.0" date="2022-12-24" />
 		<release version="1.5.1" date="2022-10-28" />