docs: fix receiver documentation

docs/components/receive.md

@@ -312,16 +312,16 @@ Please see the metric `thanos_receive_forward_delay_seconds` to see if you need
 The following formula is used for calculating quorum:
 
 ```go mdox-exec="sed -n '990,999p' pkg/receive/handler.go"
-func (h *Handler) writeQuorum() int {
-	// NOTE(GiedriusS): this is here because otherwise RF=2 doesn't make sense as all writes
-	// would need to succeed all the time. Another way to think about it is when migrating
-	// from a Sidecar based setup with 2 Prometheus nodes to a Receiver setup, we want to
-	// keep the same guarantees.
-	if h.options.ReplicationFactor == 2 {
-		return 1
-	}
-	return int((h.options.ReplicationFactor / 2) + 1)
+					h.peers.markPeerUnavailable(endpointReplica.endpoint)
+				}
+			}
+		}
+		wg.Done()
+	})
 }
+
+// writeQuorum returns minimum number of replicas that has to confirm write success before claiming replication success.
+func (h *Handler) writeQuorum() int {
 ```
 
 So, if the replication factor is 2 then at least one write must succeed. With RF=3, two writes must succeed, and so on.