docs: Routing.Type=auto timeouts for DHT/IPNI

Based on feedback from #9475

core/node/libp2p/routingopt.go

@@ -57,8 +57,8 @@ func ConstructDefaultRouting(peerID string, addrs []string, privKey string) func
 		}
 		routers = append(routers, &routinghelpers.ParallelRouter{
 			Router:       dhtRouting,
-			IgnoreError:  false,           // TODO: confirm this is what we want
-			Timeout:      1 * time.Minute, // TODO: what value makes sense here?
+			IgnoreError:  false,
+			Timeout:      5 * time.Minute, // https://github.com/ipfs/kubo/pull/9475#discussion_r1042501333
 			ExecuteAfter: 0,
 		})
 
@@ -70,8 +70,8 @@ func ConstructDefaultRouting(peerID string, addrs []string, privKey string) func
 			}
 			routers = append(routers, &routinghelpers.ParallelRouter{
 				Router:       httpRouter,
-				IgnoreError:  true,            // TODO: confirm this is what we want
-				Timeout:      1 * time.Minute, // TODO: what value makes sense here?
+				IgnoreError:  true,             // https://github.com/ipfs/kubo/pull/9475#discussion_r1042507387
+				Timeout:      15 * time.Second, // 5x server value from https://github.com/ipfs/kubo/pull/9475#discussion_r1042428529
 				ExecuteAfter: 0,
 			})
 		}

docs/changelogs/v0.18.md

@@ -75,11 +75,13 @@ The default `Routing.Type` is changed from `dht` to `auto`.
 
 When `Routing.Type` is unset or set to `auto`, your node will accelerate some types of routing
 by leveraging HTTP endpoints compatible with [IPIP-337](https://github.com/ipfs/specs/pull/337)
-in addition to the IPFS DHT.
+in addition to the IPFS DHT. DHT response timeout in `auto` mode is 5 minutes, and IPNI is 3 seconds.
 By default, an instance of IPNI ([InterPlanetary Network Indexer](https://github.com/ipni/specs/blob/main/IPNI.md#readme))
 at https://cid.contact is used.
 
+
 Old behavior can be restored by setting `Routing.Type` to `dht`.
+
 Alternative routing rules, including alternative IPNI endpoints, can be configured in `Routing.Routers` after setting `Routing.Type` to `custom`.
 
 Learn more in [`Routing` docs](https://github.com/ipfs/kubo/blob/master/docs/config.md#routing).