[backport core/1.39] fix: set audio widget value after file upload (#8958)

Backport of #8814 to `core/1.39`

Automatically created by backport workflow.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8958-backport-core-1-39-fix-set-audio-widget-value-after-file-upload-30b6d73d36508161a12fed45c4cdca00)
by [Unito](https://www.unito.io)

Co-authored-by: Johnpaul Chiwetelu <49923152+Myestery@users.noreply.github.com>

src/extensions/core/uploadAudio.ts

@@ -70,6 +70,7 @@ async function uploadFile(
           api.apiURL(getResourceURL(...splitFilePath(path)))
         )
 
+        audioWidget.value = path
         // Manually trigger the callback to update VueNodes
         audioWidget.callback?.(path)
       }