docs: Add link to v21 upgrade guide in main README.md (#3468)

Update README.md Add "Upgrade to v21.x"
SCT-Engineering · Aug 6, 2025 · ff1a6b7 · ff1a6b7
1 parent eaee8fb
commit ff1a6b7
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/README.md b/README.md
@@ -15,6 +15,7 @@ Terraform module which creates Amazon EKS (Kubernetes) resources
   - [Upgrade to v18.x](https://github.com/terraform-aws-modules/terraform-aws-eks/blob/master/docs/UPGRADE-18.0.md)
   - [Upgrade to v19.x](https://github.com/terraform-aws-modules/terraform-aws-eks/blob/master/docs/UPGRADE-19.0.md)
   - [Upgrade to v20.x](https://github.com/terraform-aws-modules/terraform-aws-eks/blob/master/docs/UPGRADE-20.0.md)
+  - [Upgrade to v21.x](https://github.com/terraform-aws-modules/terraform-aws-eks/blob/master/docs/UPGRADE-21.0.md)
 
 ### External Documentation