doc: remove extraneous comma

Trott · xtx1130 · commit 1da2c336574a · 2022-04-25T17:43:16.000+08:00
PR-URL: nodejs#42548 Reviewed-By: Richard Lau <rlau@redhat.com> Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Mestery <mestery@protonmail.com>
diff --git a/doc/api/cluster.md b/doc/api/cluster.md
@@ -131,7 +131,7 @@ Node.js process and a cluster worker differs:
    port is random the first time, but predictable thereafter. To listen
    on a unique port, generate a port number based on the cluster worker ID.
 
-Node.js does not provide routing logic. It is, therefore important to design an
+Node.js does not provide routing logic. It is therefore important to design an
 application such that it does not rely too heavily on in-memory data objects for
 things like sessions and login.
 
