Update README.md (#378)

spring-cloud-tencent-examples/polaris-gateway-example/README.md

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 ## Example Introduction
 
-This example shows how to use ```spring-cloud-tencent-polaris-gateway`` in Spring Cloud project for its features.
+This example shows how to use ```spring-cloud-tencent-polaris-gateway``` in Spring Cloud project for its features.
 
 This example contains ```gateway-zuul-service```, ```gateway-scg-service``` and ```gateway-callee-service```. ```gateway-zuul-service``` and ```gateway-scg-service``` invoke ```gateway-callee-service```.