fixes typescript mistake with type assertion

src/pages/home/report/ReportActionItemMessage.tsx

@@ -9,7 +9,7 @@ import * as ReportActionsUtils from '@libs/ReportActionsUtils';
 import * as ReportUtils from '@libs/ReportUtils';
 import CONST from '@src/CONST';
 import type {ReportAction} from '@src/types/onyx';
-import type {OriginalMessageSource} from '@src/types/onyx/OriginalMessage';
+import type {OriginalMessageAddComment} from '@src/types/onyx/OriginalMessage';
 import TextCommentFragment from './comment/TextCommentFragment';
 import ReportActionItemFragment from './ReportActionItemFragment';
 
@@ -78,7 +78,7 @@ function ReportActionItemMessage({action, displayAsGroup, reportID, style, isHid
                 iouMessage={iouMessage}
                 isThreadParentMessage={ReportActionsUtils.isThreadParentMessage(action, reportID)}
                 pendingAction={action.pendingAction}
-                source={action.originalMessage as OriginalMessageSource}
+                source={(action.originalMessage as OriginalMessageAddComment['originalMessage'])?.source}
                 accountID={action.actorAccountID ?? 0}
                 style={style}
                 displayAsGroup={displayAsGroup}