[welcome] Simplify team listing

- There are a lot more contributors who should be named, but
   it's not going to fit here. Instead, link to the website.

src/modules/welcome/WelcomePage.cpp

@@ -82,10 +82,9 @@ WelcomePage::WelcomePage( QWidget* parent )
                             "<strong>%2<br/>"
                             "for %3</strong><br/><br/>"
                             "Copyright 2014-2017 Teo Mrnjavac &lt;teo@kde.org&gt;<br/>"
-                            "Copyright 2017 Adriaan de Groot &lt;groot@kde.org&gt;<br/>"
+                            "Copyright 2017-2019 Adriaan de Groot &lt;groot@kde.org&gt;<br/>"
-                            "Thanks to: Anke Boersma, Aurélien Gâteau, Kevin Kofler, Lisa Vitolo,"
+                            "Thanks to <a href=\"https://calamares.io/team/\">the Calamares team</a> "
-                            " Philip Müller, Pier Luigi Fiorini, Rohan Garg and the <a "
+                            "and the <a href=\"https://www.transifex.com/calamares/calamares/\">Calamares "
-                            "href=\"https://www.transifex.com/calamares/calamares/\">Calamares "
                             "translators team</a>.<br/><br/>"
                             "<a href=\"https://calamares.io/\">Calamares</a> "
                             "development is sponsored by <br/>"