They need to suspend or carve out the filibuster to pass it, both said they won't do that to pass it even though they may support the bill.
It appears they’re going to use a previously passed bill regarding NASA as a shell. From the article:
What’s important for this current situation, though, is that amendments from the House are considered “privileged,” which means they can be put before the Senate without debate. That, in turn, means there’s no opportunity for Republicans to filibuster bringing the amended bill to the floor.
The entire point of the article is that this is a method they could use to bypass the opportunity to filibuster, without suspended the filibuster or making any rules changes.
You should read the article. They do not need to ammend the filibuster. They are cheating by making an allowable minor editorial change to a bill that has already been slated for a vote (hence too late to filibuster), and the minor editorial change is to replace all the text with the text of the voting theft bill.