Fix trackEvent error

src/app/pages/contribution/contribution-final-step/contribution-final-step.component.ts

@@ -87,7 +87,7 @@ export class ContributionFinalStepComponent implements OnInit {
 		this.displaySubmitLoader = true;
 		this.matomoTracker.trackEvent('submit-contribution', JSON.stringify(values));
 		this.http.post(`${domain}/occupancy/report`, values, { headers }).subscribe(response => {
-			this.matomoTracker.trackEvent('submit-contribution:success', '');
+			this.matomoTracker.trackEvent('submit-contribution:success', 'true');
 			this.displaySubmitLoader = false;
 			this.snackBar.openFromTemplate(this.snackBarContent, {
 				panelClass: 'contribute-submit-message',
@@ -95,7 +95,7 @@ export class ContributionFinalStepComponent implements OnInit {
 			});
 			this.router.navigate(['/']);
 		}, error => {
-			this.matomoTracker.trackEvent('submit-contribution:error', '');
+			this.matomoTracker.trackEvent('submit-contribution:error', 'false');
 			console.error(error);
 			this.displaySubmitLoader = false;
 			this.snackBar.open(`Une erreur s'est produite, veuillez réessayer plus tard.`, '', {