fix: Update QL documentation link and replicator command (#1440)

## Relevant issue(s)

Resolves #1439

## Description

This PR fixes the link to the query language documentation in the Readme
file as well as removing an inaccurate CLI command for setting a
replicator.

README.md

@@ -11,7 +11,7 @@
   </picture>
 </p>
 
-DefraDB is a user-centric database that prioritizes data ownership, personal privacy, and information security. Its data model, powered by the convergence of [MerkleCRDTs](https://arxiv.org/pdf/2004.00107.pdf) and the content-addressability of [IPLD](https://docs.ipld.io/), enables a multi-write-master architecture. It features [DQL](https://docs.source.network/query-specification/query-language-overview), a query language compatible with GraphQL but providing extra convenience. By leveraging peer-to-peer networking it can be deployed nimbly in novel topologies. Access control is determined by a relationship-based DSL, supporting document or field-level policies, secured by the SourceHub network. DefraDB is a core part of the [Source technologies](https://source.network/) that enable new paradigms of decentralized data and access-control management, user-centric apps, data trustworthiness, and much more.
+DefraDB is a user-centric database that prioritizes data ownership, personal privacy, and information security. Its data model, powered by the convergence of [MerkleCRDTs](https://arxiv.org/pdf/2004.00107.pdf) and the content-addressability of [IPLD](https://docs.ipld.io/), enables a multi-write-master architecture. It features [DQL](https://docs.source.network/references/query-specification/query-language-overview), a query language compatible with GraphQL but providing extra convenience. By leveraging peer-to-peer networking it can be deployed nimbly in novel topologies. Access control is determined by a relationship-based DSL, supporting document or field-level policies, secured by the SourceHub network. DefraDB is a core part of the [Source technologies](https://source.network/) that enable new paradigms of decentralized data and access-control management, user-centric apps, data trustworthiness, and much more.
 
 Read the documentation on [docs.source.network](https://docs.source.network/).
 
@@ -231,7 +231,7 @@ defradb client query '
 
 DQL is compatible with GraphQL but features various extensions.
 
-Read its documentation at [docs.source.network](https://docs.source.network/query-specification/query-language-overview) to discover its filtering, ordering, limiting, relationships, variables, aggregate functions, and other useful features.
+Read its documentation at [docs.source.network](https://docs.source.network/references/query-specification/query-language-overview) to discover its filtering, ordering, limiting, relationships, variables, aggregate functions, and other useful features.
 
 
 ## Peer-to-peer data synchronization
@@ -335,9 +335,7 @@ defradb client schema add --url localhost:9182 '
 Set *nodeA* to actively replicate the "Article" collection to *nodeB*:
 
 ```shell
-defradb client rpc addreplicator "Article" /ip4/0.0.0.0/tcp/9172/p2p/
 defradb client rpc replicator set -c "Article" /ip4/0.0.0.0/tcp/9172/p2p/<peerID_of_nodeB>
-
 ```
 
 As we add or update documents in the "Article" collection on *nodeA*, they will be actively pushed to *nodeB*. Note that changes to *nodeB* will still be passively published back to *nodeA*, via pubsub.