OSSMDOC-719: Add quoes to booleans in k8s gatewy API

Author: rh-tokeefe

modules/ossm-rn-new-features.adoc

@@ -146,10 +146,10 @@ spec:
       pilot:
         container:
           env:
-            PILOT_ENABLE_GATEWAY_API: true
-            PILOT_ENABLE_GATEWAY_API_STATUS: true
+            PILOT_ENABLE_GATEWAY_API: "true"
+            PILOT_ENABLE_GATEWAY_API_STATUS: "true"
             # and optionally, for the deployment controller
-            PILOT_ENABLE_GATEWAY_API_DEPLOYMENT_CONTROLLER: true
+            PILOT_ENABLE_GATEWAY_API_DEPLOYMENT_CONTROLLER: "true"
 ----
 Restricting route attachment on Gateway API listeners is possible using the `SameNamespace` or `All` settings. Istio ignores usage of label selectors in `listeners.allowedRoutes.namespaces` and reverts to the default behavior (`SameNamespace`).