src: use starts_with in fs_permission.cc

PR-URL: #55811
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jason Zhang <xzha4350@gmail.com>
Reviewed-By: Deokjin Kim <deokjin81.kim@gmail.com>

Author: IlyasShabi

src/permission/fs_permission.cc

@@ -58,16 +58,16 @@ bool is_tree_granted(
   std::string resolved_param = node::PathResolve(env, {param});
 #ifdef _WIN32
   // Remove leading "\\?\" from UNC path
-  if (resolved_param.substr(0, 4) == "\\\\?\\") {
+  if (resolved_param.starts_with("\\\\?\\")) {
     resolved_param.erase(0, 4);
   }
 
   // Remove leading "UNC\" from UNC path
-  if (resolved_param.substr(0, 4) == "UNC\\") {
+  if (resolved_param.starts_with("UNC\\")) {
     resolved_param.erase(0, 4);
   }
   // Remove leading "//" from UNC path
-  if (resolved_param.substr(0, 2) == "//") {
+  if (resolved_param.starts_with("//")) {
     resolved_param.erase(0, 2);
   }
 #endif