Hello michaelschlax! I would just observe it more for now, if it is not spreading to other leaves, then it should be fine. It does seem just mechanical injury as mentioned already. Just try to water root zone to keep moist and not soggy, this plant prefers to be on a dry side, and is quite drought tolerant later on.
Sometimes the tips of the leaves do get brown, either due to very low humidity or salt build up, so it helps later to do a good flush on the soil/root zone area, to remove accumulated salt build up. At times too over and underwatering manifest the same on the leaves, tips getting brown and then dropping. So be careful with watering, not too dry, and not too soggy.
