Fix spelling errors

Submitted by: Jens of Fossies.org

src/components/screen_reader_notice/screen_reader_notice.js

@@ -2,7 +2,7 @@ const ScreenReaderNotice = {
   props: {
     ariaLive: {
       type: String,
-      defualt: 'assertive'
+      default: 'assertive'
     }
   },
   data () {

src/services/sw/sw.js

@@ -36,9 +36,9 @@ function subscribePush (registration, isEnabled, vapidPublicKey) {
 
 function unsubscribePush (registration) {
   return registration.pushManager.getSubscription()
-    .then((subscribtion) => {
-      if (subscribtion === null) { return }
-      return subscribtion.unsubscribe()
+    .then((subscription) => {
+      if (subscription === null) { return }
+      return subscription.unsubscribe()
     })
 }