Update CHANGELOG.md

packages/tldraw/CHANGELOG.md

+## 1.0.4
+
+- Fixes bug in selected styles menu
+- Fixes page options dialog for page rename / delete
+- Fixes bug in arrow -> elipse intersections
+- Fixes sign in / sign out buttons both appearing
+- Fixes line breaks for sticky notes
+- Improves performance (related to menu bug above)
+- Sets default behavior of copyJson and copySvg when no shapes are selected
+
 ## 1.0.3
 
 - Improves compatibility with Create React App.