Merge pull request #7627 from apollographql/sb/broken-links

Fix a few broken links in the docs

docs/source/builtin-plugins.md

@@ -13,7 +13,7 @@ You can also [create custom plugins](./integrations/plugins/).
 | Name | Description | Location |
 |------|---------|-------------|
 | [Usage reporting](./api/plugin/usage-reporting/) | Gathers helpful operation usage data and reports it to [GraphOS](/graphos/) for visualization, alerting, and more. |`@apollo/server/plugin/usageReporting` |
-| [Schema reporting](./api/plugin/schema-reporting/) | Automatically reports the server's schema to [Apollo Studio](/studio/) on startup to enable schema history and up-to-date metrics. | `@apollo/server/plugin/schemaReporting` |
+| [Schema reporting](./api/plugin/schema-reporting/) | Automatically reports the server's schema to [GraphOS](/graphos/) on startup to enable schema history and up-to-date metrics. | `@apollo/server/plugin/schemaReporting` |
 | [Inline trace](./api/plugin/inline-trace/) | Used primarily by [federated subgraphs](https://www.apollographql.com/docs/federation/) to include operation trace data in responses to the gateway. | `@apollo/server/plugin/inlineTrace` |
 | [Cache control](./api/plugin/cache-control/) | Calculates caching behavior for operation responses. | `@apollo/server/plugin/cacheControl` |
 | [Landing page (multiple)](./api/plugin/landing-pages) | Handle displaying a default or custom landing page at Apollo Server's base URL. | `@apollo/server/plugin/landingPage/default` |

docs/source/data/subscriptions.mdx

@@ -3,11 +3,13 @@ title: Subscriptions in Apollo Server
 description: Persistent GraphQL read operations
 ---
 
->**Apollo Server does not provide built-in support for subscriptions.** You can enable support for subscriptions as [described below](#enabling-subscriptions).
->
-> **Subscriptions are not currently supported in [Apollo Federation](/federation/).**
->
-> This article uses the `graphql-ws` library to add support for subscriptions to Apollo Server 4. We no longer recommend using the previously documented `subscriptions-transport-ws`, because this library is not actively maintained. For more information about the differences between the two libraries, see [Switching from `subscriptions-transport-ws`](#switching-from-subscriptions-transport-ws).
+<blockquote>
+
+**Apollo Server does not provide built-in support for subscriptions.** You can enable support for subscriptions as [described below](#enabling-subscriptions).
+
+This article uses the `graphql-ws` library to add support for subscriptions to Apollo Server 4. We no longer recommend using the previously documented `subscriptions-transport-ws`, because this library is not actively maintained. For more information about the differences between the two libraries, see [Switching from `subscriptions-transport-ws`](#switching-from-subscriptions-transport-ws).
+
+</blockquote>
 
 **Subscriptions** are long-lasting GraphQL read operations that can update their result whenever a particular server-side event occurs. Most commonly, updated results are _pushed_ from the server to subscribing clients. For example, a chat application's server might use a subscription to push newly received messages to all clients in a particular chat room.
 
@@ -205,7 +207,7 @@ httpServer.listen(PORT, () => {
 
 </ExpansionPanel>
 
-> ⚠️ **Running into an error?** If you're using the `graphql-ws` library, your specified subscription protocol must be consistent across your backend, frontend, and **every other tool** you use (including [Apollo Sandbox](/graphos/explorer/additional-features/#subscription-support)). For more information, see [Switching from `subscriptions-transport-ws`](#switching-from-subscriptions-transport-ws).
+> ⚠️ **Running into an error?** If you're using the `graphql-ws` library, your specified subscription protocol must be consistent across your backend, frontend, and **every other tool** you use (including [Apollo Sandbox](/graphos/explorer/subscriptions-explorer)). For more information, see [Switching from `subscriptions-transport-ws`](#switching-from-subscriptions-transport-ws).
 
 ## Resolving a subscription
 
@@ -411,7 +413,7 @@ subscription IncrementingNumber {
 }
 ```
 
-> If you don't see the result of your subscription operation you might need to [adjust your Sandbox settings to use the `graphql-ws` protocol](/graphos/explorer/additional-features/#subscription-support).
+> If you don't see the result of your subscription operation you might need to [adjust your Sandbox settings to use the `graphql-ws` protocol](/graphos/explorer/subscriptions-explorer).
 
 After you start up the server in CodeSandbox, follow the instructions in the browser to test running the `numberIncremented` subscription in Apollo Sandbox. You should see the subscription's value update every second.
 
@@ -588,7 +590,7 @@ If none of these libraries fits your use case, you can also create your own `Pub
 
 ## Switching from `subscriptions-transport-ws`
 
-> If you use subscriptions with Apollo Client you must ensure **[both your client and server subscription protocols are consistent](/react/data/subscriptions/#choosing-a-subscription-library)** for the subscription library you're using.
+> If you use subscriptions with Apollo Client you must ensure **[both your client and server subscription protocols are consistent](/react/data/subscriptions/#supported-subscription-protocols)** for the subscription library you're using.
 
 This article previously demonstrated using the `subscriptions-transport-ws` library to set up subscriptions. However, this library is no longer actively maintained. You can still use it with Apollo Server, but we strongly recommend using [`graphql-ws`](https://www.npmjs.com/package/graphql-ws) instead.
 
@@ -617,13 +619,13 @@ If you intend to [switch from `subscriptions-transport-ws` to `graphql-ws`](/apo
 
 <td>
 
-[`graphql-ws`](/graphos/explorer/additional-features/#subscription-support)
+[`graphql-ws`](/graphos/explorer/subscriptions-explorer)
 
 </td>
 
 <td>
 
-[`subscriptions-transport-ws`](/graphos/explorer/additional-features/#subscription-support)
+[`subscriptions-transport-ws`](/graphos/explorer/subscriptions-explorer)
 
 </td>