docs(ins): update links

Author: bene2k1

pages/instances/concepts.mdx

@@ -15,7 +15,7 @@ import StorageBootOnBlock from '@macros/storage/boot-on-block.mdx'
 
 ## ARM Instances
 
-[ARM Instances](https://www.scaleway.com/en/cost-optimized-instances-based-on-arm/) are cost-effective and energy-efficient Instances powered by Ampere Altra processors, optimized for AI innovation, real-time applications, and sustainable cloud computing.
+[ARM Instances](/instances/reference-content/understanding-differences-x86-arm/) are cost-effective and energy-efficient Instances powered by Ampere Altra processors, optimized for AI innovation, real-time applications, and sustainable cloud computing.
 
 
 ## Availability Zone
@@ -152,4 +152,4 @@ Tags allow you to organize, sort, filter, and monitor your cloud resources using
 
 ## x86 (Intel/AMD) Instances
 
-[x86 (Intel/AMD) Instances](/instances/reference-content/development/) are reliable and high-performance Instances powered by AMD EPYC processors, tailored for development, testing, production workloads, and general-purpose applications.
+[x86 (Intel/AMD) Instances](/instances/reference-content/understanding-differences-x86-arm/) are reliable and high-performance Instances powered by AMD EPYC processors, tailored for development, testing, production workloads, and general-purpose applications.