Merge pull request #7585 from Luflosi/fix-typo

docs: fix typo in default swarm addrs config docs

Author: olizilla

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"
 ]
 ```