Use string_view in rXml

Utilities/rXml.h

@@ -23,7 +23,7 @@ struct rXmlNode
 	std::shared_ptr<rXmlNode> GetChildren();
 	std::shared_ptr<rXmlNode> GetNext();
 	std::string GetName();
-	std::string GetAttribute(const std::string& name);
+	std::string GetAttribute(std::string_view name);
 	std::string GetNodeContent();
 
 	pugi::xml_node handle{};
@@ -34,7 +34,7 @@ struct rXmlDocument
 	rXmlDocument();
 	rXmlDocument(const rXmlDocument& other) = delete;
 	rXmlDocument &operator=(const rXmlDocument& other) = delete;
-	pugi::xml_parse_result Read(const std::string& data);
+	pugi::xml_parse_result Read(std::string_view data);
 	virtual std::shared_ptr<rXmlNode> GetRoot();
 
 	pugi::xml_document handle{};