autofix: fixes from CI

Author: benjie

.cachedValidUrls.json

@@ -238,6 +238,7 @@
   "https://raw.githubusercontent.com/graphile/postgraphile-lambda-example/master/src/express-lib-view.js",
   "https://relay.dev/docs/en/graphql-server-specification",
   "https://relay.dev/docs/en/mutations",
+  "https://relay.dev/docs/guides/network-layer/",
   "https://spec.graphql.org/June2018/",
   "https://store.graphile.com",
   "https://store.graphile.com/eulas/postgraphile-pro/",

src/pages/postgraphile/security.md

@@ -154,8 +154,7 @@ const client = new ApolloClient({
 });
 ```
 
-or
-[with Relay](https://relay.dev/docs/guides/network-layer/)
+or [with Relay](https://relay.dev/docs/guides/network-layer/)
 
 ```js{3,8}
 function fetchQuery( operation, variables, cacheConfig, uploadables) {