UX: Change "Logs" icon in the navigation from "assignment" to "feed"

Signed-off-by: Michael Mayer <michael@photoprism.app>

frontend/src/component/navigation.vue

@@ -629,7 +629,7 @@
           </div>
           <div v-if="auth && !routeName('index') && $config.feature('library') && $config.feature('logs')" class="menu-action nav-logs">
             <router-link :to="{ name: 'library_logs' }">
-              <v-icon>assignment</v-icon>
+              <v-icon>feed</v-icon>
               <translate>Logs</translate>
             </router-link>
           </div>

frontend/src/page/library.vue

@@ -86,7 +86,7 @@ export default {
         'label': this.$gettext('Logs'),
         'class': '',
         'path': '/logs',
-        'icon': 'assignment',
+        'icon': 'feed',
         'readonly': true,
         'demo': true,
       });