Replace gnupg and PGP with OpenPGP

This commit replaces the tool names gnupg and PGP with the standard RFC term
OpenPGP. Thanks to Guillem Jover for the inspiration.

debianmemberportfolio/templates/base.html

@@ -2,7 +2,7 @@
           "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
 {# vim: ft=jinja
 Base template for XHTML templates.
-Copyright © 2009-2021 Jan Dittberner <jan@dittberner.info>
+Copyright © 2009-2022 Jan Dittberner <jan@dittberner.info>
 
 This file is part of the Debian Member Portfolio service.
 
@@ -38,7 +38,7 @@ with this program.  If not, see <https://www.gnu.org/licenses/>.
     <div id="footer">
       <img alt="{{ _('AGPL - Free Software') }}" id="agpllogo" src="{{ url_for('static', filename='images/agplv3-88x31.png') }}" width="88" height="31" />
       <p>{% trans browseurl='https://git.dittberner.info/jan/debianmemberportfolio', cloneurl='https://git.dittberner.info/jan/debianmemberportfolio.git', weblateurl='https://hosted.weblate.org/projects/debian-member-portfolio-service/' %}The service is available under the terms of the <a href="https://www.gnu.org/licenses/agpl.html">GNU Affero General Public License</a> as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. You can <a href="{{ browseurl }}" title="Gitweb repository browser URL">browse the source code</a> or clone it from <a href="{{ cloneurl }}" title="git clone URL">{{ cloneurl }}</a> using <a href="https://git-scm.com/">git</a>. If you want to translate this service to your language you can contribute at <a href="{{ weblateurl }}" title="Debian Member Portfolio Service at Weblate">Weblate</a>.{% endtrans %}</p>
-      <p>{{ _('Copyright © 2009-2021 Jan Dittberner') }}</p>
+      <p>{{ _('Copyright © 2009-2022 Jan Dittberner') }}</p>
     </div>
     <script type="text/javascript">
         var flattr_url = '{{ request.scheme }}://portfolio.debian.net/';