test: update CONNECT Host header expectation

Signed-off-by: Archkon <180910180+Archkon@users.noreply.github.com>

Author: Archkon

test/parallel/test-tls-over-http-tunnel.js

@@ -61,7 +61,7 @@ const proxy = net.createServer(common.mustCall((clientSocket) => {
                          `CONNECT localhost:${server.address().port} ` +
                          'HTTP/1.1\r\n' +
                          'Proxy-Connections: keep-alive\r\n' +
-                         `Host: localhost:${proxy.address().port}\r\n` +
+                         `Host: localhost:${server.address().port}\r\n` +
                          'Connection: keep-alive\r\n\r\n');
 
       console.log('PROXY: got CONNECT request');