re assiging function to sendmail

src/app/annual-health-checkup/generate-letter/generate-letter.component.html

@@ -555,7 +555,7 @@
                   </table>
                </div>
                <div class="align-middle flex-row">
-                <button mat-raised-button color="primary" (click)="downloadPDF()">Mail</button>
+                <button mat-raised-button color="primary" (click)="sendMail()">Mail</button>
                 <button mat-raised-button color="primary" (click)="cancelClick()">Cancel</button>
                 <!-- downloadPDF -->
             </div>