Fix: RWTH Image => Coscine Image (coscine/issues#1743)

src/TokenConfirmationApp.vue

 <template>
   <div id="wrap">
     <coscine-page-header
-      :rwthImage="rwthImage"
+      :coscineImage="coscineImage"
       :coscineImageBlack="coscineImageBlack"
       :locale="this.$root.$i18n.locale"
       @changeLocale="changeLocale"
@@ -45,7 +45,7 @@ import {
 } from '@coscine/component-library';
 import '@coscine/component-library/dist/index.css';
 
-import rwthImagePath from './assets/logo-rwth.svg';
+import coscineImagePath from './assets/logo-rwth.svg';
 import linkWhitePath from './assets/link_white.svg';
 import mailGreyPath from './assets/mail_grey.svg';
 import phoneGreyPath from './assets/phone_grey.svg';
@@ -80,7 +80,7 @@ export default Vue.extend({
   },
   data() {
     return {
-      rwthImage: rootUrl + rwthImagePath,
+      coscineImage: rootUrl + coscineImagePath,
       isWaitingForResponse: false,
       displayMessage: 'validating',
     };