chore(kgo): add exemplary incantations of CRD upgrade commands

charts/gateway-operator/UPGRADE.md

@@ -22,3 +22,20 @@ upgrade. Because Helm does not handle these updates, you must manually apply
 them before upgrading your release.
 
 [hip0011]: https://github.com/helm/community/blob/main/hips/hip-0011.md
+
+For example, upgrading Kong's [kubernetes-configuration][kcfg] CRDs to v0.0.38 requires
+running:
+
+```
+kustomize build github.com/Kong/kubernetes-configuration/config/crd\?rev\=v0.0.38 | kubectl apply -f -
+```
+
+[kcfg]: https://github.com/Kong/kubernetes-configuration
+
+Upgrading [Gateway API][gwapi] to v1.2.0 requires running:
+
+```
+kustomize build github.com/kubernetes-sigs/gateway-api/config/crd\?ref=v1.2.0 | kubectl apply -f -
+```
+
+[gwapi]: https://github.com/kubernetes-sigs/gateway-api/