Remove dot in case desc is empty

packages/app-shell/src/vpu-app-shell-welcome.js

@@ -63,7 +63,7 @@ class AppShellWelcome extends ScopedElementsMixin(LitElement) {
 
         return html`
             <p>${i18n.t('welcome.headline', {appname: app.topic.name[this.lang]})}
-            ${app.topic.description[this.lang] }.</p>
+            ${app.topic.description[this.lang] }</p>
             <br>
             ${itemTemplates}
         `;