Fix documentation to match new gateway-api selector syntax

docs/content/expose/kubernetes.md

@@ -325,11 +325,13 @@ kubectl create secret tls whoami-tls --cert=tls.crt --key=tls.key
         web:
           port: 80
           protocol: HTTP
-          namespacePolicy: All
+          namespacePolicy:
+            from: All
         websecure:
           port: 443
           protocol: HTTPS
-          namespacePolicy: All
+          namespacePolicy:
+            from: All
           mode: Terminate
           certificateRefs:
             - kind: Secret

docs/content/getting-started/kubernetes.md

@@ -79,7 +79,10 @@ providers:
   kubernetesGateway:
     enabled: true
 gateway:
-  namespacePolicy: All
+  listeners:
+    web:
+      namespacePolicy:
+        from: All
 ```
 
 !!! info
@@ -106,7 +109,7 @@ helm install traefik traefik/traefik --wait \
   --set ingressRoute.dashboard.matchRule='Host(`dashboard.localhost`)' \
   --set ingressRoute.dashboard.entryPoints={web} \
   --set providers.kubernetesGateway.enabled=true \
-  --set gateway.namespacePolicy=All
+  --set gateway.listeners.web.namespacePolicy.from=All
 ```
 
 !!! info

docs/content/setup/kubernetes.md

@@ -162,12 +162,14 @@ gateway:
     web:           # HTTP listener that matches entryPoint `web`
       port: 80
       protocol: HTTP
-      namespacePolicy: All
+      namespacePolicy:
+        from: All
 
     websecure:         # HTTPS listener that matches entryPoint `websecure`
       port: 443
       protocol: HTTPS  # TLS terminates inside Traefik
-      namespacePolicy: All
+      namespacePolicy:
+        from: All
       mode: Terminate
       certificateRefs:    
         - kind: Secret