docs: fix typo

Luflosi · Luflosi · commit 0155a88e5fe7 · 2020-08-08T23:12:49.000+02:00
diff --git a/docs/config.md b/docs/config.md
@@ -260,7 +260,7 @@ Default:
 [
   "/ip4/0.0.0.0/tcp/4001",
   "/ip6/::/tcp/4001",
-  "/ip6/0.0.0.0/udp/4001/quic",
+  "/ip4/0.0.0.0/udp/4001/quic",
   "/ip6/::/udp/4001/quic"
 ]
 ```
