small sequencer update

docs/overview/components/the-astria-sequencer.md

@@ -2,7 +2,7 @@
 
 The Astria Shared Sequencer is a decentralized network of nodes utilizing CometBFT that come to consensus on an ordered set of transactions (ie. it is a blockchain). The unique feature of the sequencer is that the transactions it includes are not executed (lazy sequencing), and are destined for another execution engine (ie. a rollup). This excludes “sequencer native” transactions, such as transfers of tokens within the sequencer chain. Transactions from any given rollup are only ordered on the sequencer, not executed.
 
-The sequencer can optionally act as a “validator”, meaning it actively
+The sequencer node can optionally act as a “validator”, meaning it actively
 participates in the production and finalization of new blocks.
 
 ![Astria Shared Sequencer](../assets/shared-sequencer-overview.png)