Update Mediatutorial

Fixed a few typos

Author: dcashpeterson

docs/spfx/viva/get-started/actions/media-upload/MediaUploadTutorial.md

@@ -101,7 +101,7 @@ public get cardButtons(): [ICardButton] | [ICardButton, ICardButton] | undefined
     {
       title: strings.UploadPNG,
       action: {
-        type: 'VivaAction.SelectMedia'
+        type: 'VivaAction.SelectMedia',
         parameters: {
             mediaType: MediaType.Image
         }
@@ -224,7 +224,7 @@ Add the following properties to the `IQuickViewData` interface:
 filesUploaded: string;
 ```
 
-and then add the following two lines in the returned object of `data` getter:
+and then add the following line in the returned object of `data` getter:
 
 ```typescript
 filesUploaded: this.state.filesUploaded