crypto/tls: fix DialContext docs

Change-Id: I58e3febbf63049bebb4f8ed8893288183c8aaccd
Reviewed-on: https://go-review.googlesource.com/c/go/+/239745
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
diff --git a/src/crypto/tls/tls.go b/src/crypto/tls/tls.go
index 36d98d3..1c5173e 100644
--- a/src/crypto/tls/tls.go
+++ b/src/crypto/tls/tls.go
@@ -235,7 +235,7 @@
 	return new(net.Dialer)
 }
 
-// Dial connects to the given network address and initiates a TLS
+// DialContext connects to the given network address and initiates a TLS
 // handshake, returning the resulting TLS connection.
 //
 // The provided Context must be non-nil. If the context expires before