fix: handle close errors

pkg/net/utls/utls.go

@@ -38,7 +38,7 @@ func (rt *UtlsRoundTripper) RoundTrip(req *http.Request) (*http.Response, error)
 	}, utls.HelloFirefox_120)
 
 	if err := uconn.HandshakeContext(req.Context()); err != nil {
-		uconn.Close()
+		_ = uconn.Close()
 		return nil, fmt.Errorf("utls handshake: %w", err)
 	}
 
@@ -47,7 +47,7 @@ func (rt *UtlsRoundTripper) RoundTrip(req *http.Request) (*http.Response, error)
 		t := &http2.Transport{}
 		cc, err := t.NewClientConn(uconn)
 		if err != nil {
-			uconn.Close()
+			_ = uconn.Close()
 			return nil, fmt.Errorf("http2 client conn: %w", err)
 		}
 		return cc.RoundTrip(req)
@@ -55,7 +55,7 @@ func (rt *UtlsRoundTripper) RoundTrip(req *http.Request) (*http.Response, error)
 
 	// Fallback to HTTP/1.1
 	if err := req.Write(uconn); err != nil {
-		uconn.Close()
+		_ = uconn.Close()
 		return nil, fmt.Errorf("http1 write: %w", err)
 	}
 	return http.ReadResponse(bufio.NewReader(uconn), req)