Fix Gateway API links for siteproof (projectcontour#3596)

Signed-off-by: Sunjay Bhatia <sunjayb@vmware.com>

site/_posts/2021-02-25-contour_v1130.md

@@ -69,14 +69,14 @@ For version 1.13, special thanks go out to the following contributors:
 [3]: https://projectcontour.io/resources/deprecation-policy/
 [4]: https://projectcontour.io/guides/gateway-api/
 [5]: https://github.com/projectcontour/contour-operator
-[6]: https://gateway-api.sigs.k8s.io/gateway/
-[7]: https://gateway-api.sigs.k8s.io/httproute/
+[6]: https://gateway-api.sigs.k8s.io/api-types/gateway/
+[7]: https://gateway-api.sigs.k8s.io/api-types/httproute/
 [8]: https://www.envoyproxy.io/docs/envoy/latest/intro/arch_overview/other_features/global_rate_limiting
 [9]: https://github.com/envoyproxy/ratelimit
 [10]: https://www.envoyproxy.io/docs/envoy/latest/api-v3/service/ratelimit/v3/rls.proto
 [11]: https://projectcontour.io/guides/global-rate-limiting/
 [12]: https://projectcontour.io/docs/v1.13.0/config/rate-limiting/
 [13]: https://projectcontour.io/docs/v1.13.0/config/api/#projectcontour.io/v1.GlobalRateLimitPolicy
 [14]: https://www.envoyproxy.io/docs/envoy/v1.17.0/configuration/http/http_filters/rate_limit_filter
-[15]: https://gateway-api.sigs.k8s.io/api-overview/#roles-and-personas
+[15]: https://gateway-api.sigs.k8s.io/concepts/api-overview/#roles-and-personas
 [16]: https://github.com/projectcontour/contour/releases/tag/v1.13.0