Link docs, update comments

Author: robrichard

packages/relay-runtime/store/__tests__/RelayModernEnvironment-ExecuteWithDefer-test.js

@@ -313,6 +313,13 @@ describe.each(['RelayModernEnvironment', 'MultiActorEnvironment'])(
       });
 
       it('processes deferred payloads with deduplicated fields', () => {
+        // This functionality prevents Relay from throwing an error when missing
+        // fields are received in a deferred response. This is required for the
+        // latest `@defer` spec proposal, which does not send duplicate fields
+        // in deferred responses. While Relay does not yet attempt to support the latest
+        // spec proposal (https://github.com/graphql/defer-stream-wg/discussions/69),
+        // this option allows users to transform responses into a format that Relay
+        // can accept.
         environment = new RelayModernEnvironment({
           network: RelayNetwork.create(fetch),
           store,

website/docs/api-reference/relay-runtime/relay-environment.md

@@ -48,6 +48,6 @@ Notable options include:
 * [`missingFieldHandlers`](../../guided-tour/reusing-cached-data/filling-in-missing-data.md) - A list of handlers that will be called when a field is missing from the store. This can be used to enable fulfilling queries to fields like `Query.node` from cache.
 * `getDataID` - A function that will be called to generate a unique ID for a given object. This can be used to customize the way that Relay generates IDs for objects if your server does not implement the [Global Object Identification spec](https://graphql.org/learn/global-object-identification/).
 * [`relayFieldLogger`](./field-logger.md) - A function that will be called when Relay encounters a field-level error.
-* [`_deferDeduplicatedFields`] - Set to true if you are using the latest `@defer` spec proposal, which does not send duplicate fields in deferred responses.
+* `deferDeduplicatedFields` - Set to true if you are using the [latest](https://github.com/graphql/defer-stream-wg/discussions/69) `@defer` spec proposal, which does not send duplicate fields in deferred responses.
 
 For a full list of options, inspect the [provided TypeScript types](https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/relay-runtime/lib/store/RelayModernEnvironment.d.ts#L26-L43).