Replace Memory::Copy with std::copy

src/openrct2/core/String.cpp

@@ -14,6 +14,7 @@
  *****************************************************************************/
 #pragma endregion
 
+#include <algorithm>
 #include <cwctype>
 #include <stdexcept>
 #include <vector>
@@ -376,7 +377,7 @@ namespace String
         }
 
         utf8 * result = Memory::Allocate<utf8>(size + 1);
-        Memory::Copy(result, buffer + index, size);
+        std::copy_n(buffer + index, size, result);
         result[size] = '\0';
         return result;
     }