refactor: use std::ranges::any_of in has_enabled_clients

Author: neatnoise

src/nvhttp.cpp

@@ -1252,12 +1252,7 @@ namespace nvhttp {
   }
 
   bool has_enabled_clients() {
-    for (const auto &named_cert : client_root.named_devices) {
-      if (named_cert.enabled) {
-        return true;
-      }
-    }
-    return false;
+    return std::ranges::any_of(client_root.named_devices, [](const auto &c) { return c.enabled; });
   }
 
   bool is_client_enabled(const std::string_view cert_pem) {