update specfile comment for the default_favorites patch

plasma-desktop.spec

@@ -20,7 +20,7 @@ URL:     https://quickgit.kde.org/?p=%{name}.git
 Source0: http://download.kde.org/%{stable}/plasma/%{version}/%{name}-%{version}.tar.xz
 
 ## downstream patches
-# default kickoff favorites: -preferred_browser(buggy) +firefox +konsole +apper
+# default kickoff favorites: +konsole +apper
 Patch100: plasma-desktop-5.7.95-default_favorites.patch
 # Restore PackageKit integration feature
 Patch103: plasma-desktop-PackageKit.patch