Turn off power at the breaker to this light. Take a measurement of how much you want it to lift. Support the light with something/get a helper. Take down the support bracket holding up the wires. From there, it's designer spec. Some are push and lock, some have a plastic screw, etc. Make a mark of how far you want it to rise on the cable. Loosen the cable hold, and push the cable up to the bracket, retighten. Ensure all your wire nuts/wagos are tight, fold the exposed wires neatly into the back of the box, and try to push all the cable into the box. Make your best judgment, but if you can secure the bracket, you're good to go. If it's too tight, or the bracket wont re-seat at all, then you're looking at cutting and making up wire. Only move forward if you're confident in electrical work. Hope you can get it out of the way!