docs(gpu): add h100 migration to menu (#5833)

Author: bene2k1

pages/gpu/menu.ts

@@ -67,6 +67,10 @@ export const gpuMenu = {
             'GPU Instances internet and Block Storage bandwidth overview',
           slug: 'gpu-instances-bandwidth-overview',
         },
+        {
+          label: 'Migrating from H100-2-80G to H100-SXM-2-80G',
+          slug: 'migration-h100',
+        },
         {
           label: 'GPU time-slicing with Kubernetes',
           slug: 'kubernetes-gpu-time-slicing',