https: change var to let in lib/https.js

Changed a variable declaration.

PR-URL: #30320
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Сковорода Никита Андреевич <[email protected]>
Reviewed-By: Jiawen Geng <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>

lib/https.js

@@ -158,7 +158,7 @@ Object.setPrototypeOf(Agent, HttpAgent);
 Agent.prototype.createConnection = createConnection;
 
 Agent.prototype.getName = function getName(options) {
-  var name = HttpAgent.prototype.getName.call(this, options);
+  let name = HttpAgent.prototype.getName.call(this, options);
 
   name += ':';
   if (options.ca)