Update PMD-Designer application logo

Note: The logo is not shown under Linux/gnome-shell with openjfx 11. It works though with openjfx 18.

Fixes #43

Author: adangel

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## 7.0.0-rc1
 
+**Fixed issues:**
+
+* [#43](https://github.com/pmd/pmd-designer/issues/43) Update PMD 7 Logo in the Designer
+
 **Merged pull requests:**
 
 * [#51](https://github.com/pmd/pmd-designer/pull/51) Compat with pmd/pmd#3893 by [@oowekyala](https://github.com/oowekyala)