[fix] Debug badge update fix (flutter#8425)

Fix typo in flutter#8395.

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Author: pq

src/io/flutter/toolwindow/ToolWindowBadgeUpdater.java

@@ -46,7 +46,7 @@ else if (app.getMode() == RunMode.DEBUG) {
         if (debugToolWindow != null) {
           Icon baseIcon = AllIcons.Toolwindows.ToolWindowDebugger;
           BadgeIcon iconWithBadge = new BadgeIcon(baseIcon, BADGE_PAINT);
-          runToolWindow.setIcon(iconWithBadge);
+          debugToolWindow.setIcon(iconWithBadge);
         }
       });
     }