Add illustrations to 1.4.3 release notes (#54)

Author: morevnaproject

source/releases/stable/1.4.3.md

@@ -3,21 +3,44 @@
 Synfig Studio 1.4.3 introduces major performance optimizations for Windows users and important bugfixes for all platforms. Please read the details below.
 
 ### Optimizations for Windows version
+
+```{image} 1.4.3_dat/windows-boost.jpg
+:alt: image
+:width: 300px
+```
 - We have removed many bottlenecks in Synfig's code, related with redundant calls of "getenv" function. This resulted in great performance improvement of Windows version ([#2826](https://github.com/synfig/synfig/issues/2826)). This fix also gives slight speed boost for MacOS, while Linux users will not see any significant difference.
 - Windows version now shipped with embedded Python version 3.8.10, which results in smaller size of distributive and faster installation ([#67](https://github.com/morevnaproject/morevna-builds/pull/67)).
 
 ### Critical fixes
+
+```{image} 1.4.3_dat/link-to-spline-demo.gif
+:alt: Link to spline demo
+:width: 400px
+```
+
 - Connecting bone parameter to exported value does not results in corrupted file anymore ([#2433](https://github.com/synfig/synfig/issues/2433)).
 - Fixed issue with autosave not working when interval is set to 15 seconds ([#2647](https://github.com/synfig/synfig/issues/2647)).
 - Fixed "Link To Spline" action not shown in menu when trying to connect vertex to spline ([#2344](https://github.com/synfig/synfig/issues/2344)).
 - Fixed Appimage compatibility with recent Linux distributions ([#33](https://github.com/morevnaproject/morevna-builds/pull/33)).
 - Fixed issue with Text Tool not working on MacOS because of missing "fonts.conf" file ([#2380](https://github.com/synfig/synfig/issues/2380)).
 
 ### Improvements
-- Ask if user wants to link transformation instead of origin ([#2468](https://github.com/synfig/synfig/issues/2468)).
+
+```{image} 1.4.3_dat/wrong-bone-link.png
+:alt: Wrong bone link warning
+:width: 400px
+```
+
+- Avoid mistakes when linking group to bone: the dialog asks if user wants to link transformation instead of origin ([#2468](https://github.com/synfig/synfig/issues/2468)).
 - The "Link width and height" option is enabled by default in Render Settings ([#2351](https://github.com/synfig/synfig/issues/2351)).
 
 ### Export
+
+```{image} 1.4.3_dat/render-settings.png
+:alt: Render dialog
+:width: 400px
+```
+
 - Fixed issue with wrong image aspect when rendering to non-standard dimensions ([#2463](https://github.com/synfig/synfig/issues/2463)).
 - Fixed exporting issue which was resulting in exported video trimmed to audio length ([#2477](https://github.com/synfig/synfig/issues/2477)).
 - Fixed "magick++" render module not available in in Linux AppImage ([#2320](https://github.com/synfig/synfig/issues/2320)).