Merge pull request #91 from majinghe/fix/error-link-delete

delete error docs link

Author: majinghe

docs/upgrade-scale/index.md

@@ -8,7 +8,7 @@ description: "Learn about RustFS upgrades and scaling."
 Contents:
 
 - [Availability and Resiliency Description](./availability-and-resiliency.md)
-- [Upgrade](./upgrade.md)
+- Upgrade
 - Scaling
 - Retirement
 - Rebalancing