fix jwt doc (envoyproxy#2135)

Signed-off-by: huabing zhao <zhaohuabing@gmail.com>

site/content/en/latest/user/jwt-authentication.md

@@ -49,7 +49,7 @@ kubectl get securitypolicy/jwt-example -o yaml
 ### GRPCRoute
 
 ```shell
-kubectl apply -f https://raw.githubusercontent.com/envoyproxy/gateway/latest/examples/kubernetes/jwt/grtpc-jwt.yaml
+kubectl apply -f https://raw.githubusercontent.com/envoyproxy/gateway/latest/examples/kubernetes/jwt/grpc-jwt.yaml
 ```
 
 A SecurityPolicy has been created and targeted GRPCRoute yages to authenticate all requests for `yages` service..
@@ -91,7 +91,7 @@ A `401` HTTP response code should be returned.
 Get the JWT used for testing request authentication:
 
 ```shell
-TOKEN=$(curl https://raw.githubusercontent.com/envoyproxy/gateway/main/examples/kubernetes/authn/test.jwt -s) && echo "$TOKEN" | cut -d '.' -f2 - | base64 --decode -
+TOKEN=$(curl https://raw.githubusercontent.com/envoyproxy/gateway/main/examples/kubernetes/jwt/test.jwt -s) && echo "$TOKEN" | cut -d '.' -f2 - | base64 --decode -
 ```
 
 __Note:__ The above command decodes and returns the token's payload. You can replace `f2` with `f1` to view the token's
@@ -128,7 +128,7 @@ Error invoking method "yages.Echo/Ping": rpc error: code = Unauthenticated desc
 Get the JWT used for testing request authentication:
 
 ```shell
-TOKEN=$(curl https://raw.githubusercontent.com/envoyproxy/gateway/main/examples/kubernetes/authn/test.jwt -s) && echo "$TOKEN" | cut -d '.' -f2 - | base64 --decode -
+TOKEN=$(curl https://raw.githubusercontent.com/envoyproxy/gateway/main/examples/kubernetes/jwt/test.jwt -s) && echo "$TOKEN" | cut -d '.' -f2 - | base64 --decode -
 ```
 
 __Note:__ The above command decodes and returns the token's payload. You can replace `f2` with `f1` to view the token's