Update total billing label to just total

Change "Total facturable" label to "Total" in the timesheet detail page component.

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artifacts/cra-app/src/pages/timesheet-detail.tsx

@@ -428,7 +428,7 @@ export default function TimesheetDetailPage() {
               Ajouter un projet
             </Button>
             <div className="text-sm font-medium">
-              Total facturable: <span className="text-lg text-primary">{grandTotal}h</span>
+              Total: <span className="text-lg text-primary">{grandTotal}h</span>
             </div>
           </div>
         )}