Fix GRPC route link in Kubernetes Gateway API blog

Author: vaibhav2107

content/en/blog/_posts/2022-07-13-gateway-api-in-beta.md

@@ -169,7 +169,7 @@ If there's something on this list you want to get involved in, or there's
 something not on this list that you want to advocate for to get on the roadmap
 please join us in the #sig-network-gateway-api channel on Kubernetes Slack or our weekly [community calls](https://gateway-api.sigs.k8s.io/contributing/community/#meetings).
 
-[gep1016]:https://github.com/kubernetes-sigs/gateway-api/blob/master/site-src/geps/gep-1016.md
+[gep1016]:https://github.com/kubernetes-sigs/gateway-api/blob/main/geps/gep-1016.md
 [grpc]:https://grpc.io/
 [pr1085]:https://github.com/kubernetes-sigs/gateway-api/pull/1085
 [tcpr]:https://github.com/kubernetes-sigs/gateway-api/blob/main/apis/v1alpha2/tcproute_types.go