Update 1.x.md

Author: AnidemDex

docs/changelog/1.x.md

@@ -14,6 +14,7 @@
 * **Remove limits on PortraitManager.add_portrait() method for relative size.** Make your portrait bigger than the 100% of the portrait manager rect! [#66](https://github.com/AnidemDex/Godot-DialogPlugin/pull/66)
 * **Improved the text_autoscroll feature.** Because the old one was pretty unestable and weird to use.
 * **`EventDialogText.continue_at_end` will be false by default.**
+* **`DialogNode` default theme**. Now it uses a better (generic) one.
 
 ### Fixed:
 * **Fix an issue related to showing DialogNode on show_text() call**. Because somebody forgots to shows the node in a `show` function. [#53](https://github.com/AnidemDex/Godot-DialogPlugin/pull/53)