docs: kustomize has access to build environment (#11643)

Current docs reflect that the build environment is not available to kustomize. Since #8096 it is now exposed for kustomize. This updates the kustomize section of the docs to reflect that.

Signed-off-by: Nicholas Morey <nicholas@morey.tech>

Signed-off-by: Nicholas Morey <nicholas@morey.tech>

docs/user-guide/kustomize.md

@@ -84,7 +84,7 @@ argocd app set <appName> --kustomize-version v3.5.4
 
 ## Build Environment
 
-Kustomize does not support parameters and therefore cannot support the standard [build environment](build-environment.md).
+Kustomize apps have access to the [standard build environment](build-environment.md) which can be used in combination with a [config managment plugin](config-management-plugins.md) to alter the rendered manifests.
 
 ## Kustomizing Helm charts