Update go version in docs

- Update go version references in development docs to v1.20 or higher
- Fix link to ko docs, now that they have an offical docs site.

docs/development/local-development.md

@@ -3,7 +3,7 @@
 ## Prerequisites
 
 * Ensure you have access to a Kubernetes cluster via `kubectl` with cluster admin permissions.
-* Install Go version 1.18 or higher.
+* Install [Go](https://go.dev/doc/install) version 1.20 or higher.
 
 ## Building locally
 
@@ -28,7 +28,7 @@ The following make options can be set:
 * `VERSION` - defaults to the current version of Shipwright.
   This must be a valid [semantic version](https://semver.org/), and will be used as the tag for the resulting image.
 
-Refer to the [ko documentation](https://github.com/google/ko#local-publishing-options) for more information.
+Refer to the [ko documentation](https://ko.build/) for more information.
 
 ## Deploy to Kubernetes
 

docs/development/olm-development.md

@@ -9,7 +9,7 @@ Additional steps need to be taken to ensure the operator can be deployed with OL
 ## Prerequisites
 
 * Ensure you have access to a Kubernetes cluster via `kubectl` with cluster admin permissions.
-* Install Go version 1.17 or higher.
+* Install [Go](https://go.dev/doc/install) version 1.20 or higher.
 * Install OLM on your cluster. This can be done using the `make install-olm` command.
 * Ability to push to a container registry that is accessible inside your Kubernetes cluster.