show new mascot in about dialog

kate/data/kate.qrc

@@ -5,5 +5,6 @@
     </qresource>
     <qresource prefix="/kate">
         <file alias="kate.svg">../icons/unix/sc-apps-kate.svg</file>
+        <file alias="mascot.png">mascot.png</file>
     </qresource>
 </RCC>

kate/main.cpp

@@ -130,7 +130,8 @@ int main(int argc, char **argv)
                          i18n("Kate - Advanced Text Editor"),
                          KAboutLicense::LGPL_V2,
                          i18n("(c) 2000-2021 The Kate Authors"),
-                         QString(),
+                         // use the other text field to get our mascot into the about dialog
+                         QStringLiteral("<img height=\"362\" width=\"512\" src=\":/kate/mascot.png\"/>"),
                          QStringLiteral("https://kate-editor.org"));
 
     /**