Small fixes

Author: fabriziopandini

docs/book/src/tasks/experimental-features/runtime-sdk/implement-lifecycle-hooks.md

@@ -35,6 +35,9 @@ Following recommendations are especially relevant:
 
 ## Definitions
 
+For additional details fo additional details about the OpenAPI spec of the lifecycle hooks, please download the [`runtime-sdk-openapi.yaml`]({{#releaselink repo:"https://github.com/kubernetes-sigs/cluster-api" gomodule:"sigs.k8s.io/cluster-api" asset:"runtime-sdk-openapi.yaml" version:"1.11.x"}})
+file and then open it from the [Swagger UI](https://editor.swagger.io/).
+
 ### BeforeClusterCreate
 
 This hook is called after the Cluster object has been created by the user, immediately before all the objects which 

docs/proposals/20220414-lifecycle-hooks.md

@@ -134,7 +134,7 @@ to avoid duplication.
 Note: Following change will be applied to the hooks with the ongoing work for [Chained and efficient upgrades](); the 
 documentation in the book will be aligned as soon as the work completes:
 
-#### BeforeClusterCreate (modified)
+#### BeforeClusterUpgrade (modified)
 
 Request message will be extended with the info about the upgrade plane. e.g.