Undo the clip holding the injector to the fuel rail by slightly spreading it and then sliding it.

Pull the injector to extract it. You may need to do gentle rocking/rotating motions to unstuck it: the seal may be dry do the extended contact with fuel.

Reinstallation: make sure that the clip makes a square shape, like it was when you were undoing it. You may need to pull out the injector slightly to pull the clip back perfectly in the slot intended for this.

Reinstallation: torque the 2 8mm screws at 10 N.m.

Reinstallation: ideally, you should replace the seals. Lubrify (by a hint) the seals using a finger and some silicone spray to both help the reinsertion of the injectors on the rail and when reinstalling the assembled fuel ramp on the intake manifold.

Refitting: Clean the injector wells on the intake manifold (holes into which the injectors are inserted) to ensure a tight seal.

Avoid getting any debris into these holes, as they open almost directly into the valves. Any debris sucked into the engine can create catastrophic consequences.

Improper installation of the injectors can cause an air leak, which can be very harmful!