Update faq.mdx

Author: bene2k1

pages/billing/faq.mdx

@@ -28,7 +28,7 @@ The Stardust1-s indicated at €0,0025 excl/hour can be split up as follows:
 
 For more information, refer to our dedicated [pricing page](https://www.scaleway.com/en/pricing/).
 
-### When does the billing of an Instance start and stop?
+### When does the billing of a resource start and stop?
 The final price of your Instance is calculated according to the characteristics of your resource. Each of these resources is billed separately for a minimum of 60 minutes.
 
 Each uninterrupted period between a start and a stop billing event will be considered a unique resource. It is the number of these unique resources noted within a month that are displayed in the consumption table of your invoice.
@@ -179,4 +179,4 @@ When you commit to an amount and purchase a savings plan, you receive a monthly
 
 ### Why am I incurring charges while my savings plan utilization is less than 100%?
 When you purchase a savings plan, you commit to a monthly rate in resource consumption. This means that even if you do not consume enough resources, you are still billed for the full committed rate with discounts.
-Refer to the [Understanding savings plan](/billing/additional-content/understanding-savings-plans/) documentation page for more information.
+Refer to the [Understanding savings plan](/billing/additional-content/understanding-savings-plans/) documentation page for more information.