Add required phrases to lgpl-3.0_16.RULE

The rule is an LGPL-3.0 notice, but nothing in it was required, so a
partial sequence match reported LGPL-3.0 for LGPL-2.x notices of the same
shape that never mention version 3. Mark the two version-bearing phrases
as required.

Reported in #4995.

Signed-off-by: Eljees <3.14hell@gmail.com>

Author: Eljees

src/licensedcode/data/rules/lgpl-3.0_16.RULE

@@ -4,14 +4,14 @@ is_license_notice: yes
 ---
 
 *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU Lesser General Public License version 3 as
+ *  it under the terms of the {{GNU Lesser General Public License version 3}} as
  *  published by the Free Software Foundation.
  *
  *  This program 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.
  *
- *  You should have received a copy of the GNU Lesser General Public License version 3
+ *  You should have received a copy of the {{GNU Lesser General Public License version 3}}
  *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA