net: update renamed test name in comment

TestSelfConnect from CL 5650071 was renamed TestTCPSelfConnect in CL 21447.

Change-Id: I0de110dbe1da77bfba540a1b51c139f3bedae67f
Reviewed-on: https://go-review.googlesource.com/c/go/+/213437
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
diff --git a/src/net/dial_test.go b/src/net/dial_test.go
index ae40079..493cdfc 100644
--- a/src/net/dial_test.go
+++ b/src/net/dial_test.go
@@ -174,7 +174,7 @@
 	}
 	addr := l.Addr().String()
 	l.Close()
-	// On OpenBSD, interference from TestSelfConnect is mysteriously
+	// On OpenBSD, interference from TestTCPSelfConnect is mysteriously
 	// causing the first attempt to hang for a few seconds, so we throw
 	// away the first result and keep the second.
 	for i := 1; ; i++ {