filetemplates: fix wrong text of LGPLv2+ (KDE) (was GPLv2+ (KDE) one)

BUG:414978
FIXED-IN:5.4.6

plugins/filetemplates/licenses/LGPL v2+ (KDE)

 <one line to give the library's name and an idea of what it does.>
 Copyright <year>  <copyright holder>
 
-This program is free software; you can redistribute it and/or
-modify it under the terms of the GNU General Public License as
-published by the Free Software Foundation; either version 2 of
-the License or (at your option) version 3 or any later version
-accepted by the membership of KDE e.V. (or its successor approved
-by the membership of KDE e.V.), which shall act as a proxy
-defined in Section 14 of version 3 of the license.
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) version 3, or any
+later version accepted by the membership of KDE e.V. (or its
+successor approved by the membership of KDE e.V.), which shall
+act as a proxy defined in Section 6 of version 3 of the license.
 
-This program is distributed in the hope that it will be useful,
+This library is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Lesser General Public License for more details.
 
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
+You should have received a copy of the GNU Lesser General Public
+License along with this library.  If not, see <https://www.gnu.org/licenses/>.