fix: TTA-196 variable was ill defined

Author: mmaquina

src/app/modules/shared/pipes/substract-date-return-float/substract-date-return-float.pipe.ts

@@ -1,7 +1,7 @@
 import { Pipe, PipeTransform } from '@angular/core';
 import * as moment from 'moment';
 
-let FIXED_POINT_DIGITS 1;
+const FIXED_POINT_DIGITS = 1;
 @Pipe({
   name: 'substractDateDisplayAsFloat'
 })