Add missing async in addRowPairing

src/pages/account/account.ts

@@ -526,7 +526,7 @@ private getCancelFunction(): string {
 }
 
 // Fonctions de gestion des tableaux
-private addRowPairing(): void {
+private async addRowPairing(): Promise<void> {
     if (isAddingRow) return;
     isAddingRow = true;