eslint corrections in mainbundle

src/Bundle/ChillMainBundle/Resources/public/vuejs/HomepageWidget/MyAccompanyingCourses.vue

@@ -28,7 +28,8 @@
         <td>{{ $d(c.openingDate.datetime, 'short') }}</td>
         <td>
           <span
-            v-for="i in c.socialIssues"
+            v-for="(i, index) in c.socialIssues"
+            :key="index"
             class="chill-entity entity-social-issue"
           >
             <span class="badge bg-chill-l-gray text-dark">
@@ -112,4 +113,4 @@ export default {
 span.badge.rounded-pill.bg-danger {
    text-transform: uppercase;
 }
-</style>
+</style>