Clarify CSAT score as five-point scale

Author: carcla

power-platform/guidance/case-studies/tiendas-cuadra-customer-service.md

@@ -53,7 +53,7 @@ The solution makes customer service smoother and more reliable. It's always avai
 
 Key metrics:
 
-- Customer satisfaction score increased from approximately 3.9 to 5.0.
+- Customer satisfaction score increased from approximately 3.9 to 5.0 on a five-point scale.
 - Answer quality improved from approximately 57 to 95.5 percent.
 - Automated case creation generates hundreds of cases every week.