fix: don’t assign unused props

v-model assigns the individual arguments as prop. We don’t need that
because we already provided the content sequence as a whole as `item`
prop.

src/components/AContentSequenceBuilder.vue

@@ -55,14 +55,14 @@
                 </div>
                 <AContentSequenceItem
                   :ref="sequenceItemElements.set"
-                  v-model:speakersText="data.speakersText"
-                  v-model:internalNote="data.internalNote"
-                  v-model:audiofileId="data.audiofileId"
                   :source-content-sequence-id="contentSequenceId"
                   :item="data"
                   :level="level"
                   :order-changes="orderChanges"
                   :allow-insertion="index === 0"
+                  @update:speakers-text="data.speakersText = $event"
+                  @update:internal-note="data.internalNote = $event"
+                  @update:audiofile-id="data.audiofileId = $event"
                   @update:nested-sequence-id="embedSchedule(data, $event)"
                   @insert="
                     batch(() => insertSequenceItem(sequenceItems, contentSequenceId, data, $event))