fixes minor typo in http-routing guide (#3089)

fix nit

Signed-off-by: zirain <zirain2009@gmail.com>

site/content/en/latest/user/traffic/http-routing.md

@@ -214,7 +214,7 @@ Get another JWT used for testing request authentication:
 TOKEN=$(curl https://raw.githubusercontent.com/envoyproxy/gateway/main/examples/kubernetes/jwt/with-different-claim.jwt -s) && echo "$TOKEN" | cut -d '.' -f2 - | base64 --decode -
 ```
 
-Test HTTP routing to the `bar-svc` backenbackend by specifying a JWT Token with a claim `name: Tom`.
+Test HTTP routing to the `bar-svc` backend by specifying a JWT Token with a claim `name: Tom`.
 
 ```shell
 curl -sS -H "Authorization: Bearer $TOKEN" "http://${GATEWAY_HOST}/" | jq .pod