[Gateway] Mention default polling interval in the docs (#6144)

packages/services/storage/src/tokens.ts

@@ -89,7 +89,7 @@ export async function createTokenStorage(
             )})
           RETURNING *
         `,
-      )
+      );
 
       return transformToken(row);
     },

packages/web/docs/src/pages/docs/gateway/supergraph-proxy-source.mdx

@@ -2,7 +2,7 @@
 title: 'Gateway: Supergraph schema'
 ---
 
-import { Tabs } from '@theguild/components'
+import { Callout, Tabs } from '@theguild/components'
 
 # Supergraph / Proxy Source
 
@@ -212,11 +212,21 @@ export const gatewayConfig = defineConfig({
   supergraph: {
     /* Supergraph Configuration */
   },
-  // Poll the schema registry every 10 seconds
+  // By default it polls the schema registry every 10 seconds
   pollingInterval: 10_000
 })
 ```
 
+<Callout>
+If you use a source like Hive CDN or a custom URL as a source for the supergraph schema,
+CLI will automatically poll the source for changes and update the schema accordingly with 10 seconds interval.
+If you want to change this behavior by setting the `--polling=10s` flag or `pollingInterval` in the configuration file.
+
+[Learn more about the configuration file](/docs/api-reference/gateway-config)
+[Learn more about the CLI flags](/docs/api-reference/gateway-cli)
+
+</Callout>
+
 ## Proxy
 
 Instead of serving a supergraph, you can also use Hive Gateway to proxy any existing GraphQL API.