Your head is parented to the head bone with a simple parentage, so when you move the head bone, it moves the head vertices. Among these vertices there are the eyebrows, and you've assigned these eyebrows to the vertex group that are controlled by two bones. So these particular vertices are affected by both the head bone and their own bone, which is not good. You need to change your method, for example select all the head vertices except eyebrows vertices and assign them to a vertex group that has the name of the head bone , and enable the head bone deform option. That way the head bone will move the whole except the eyebrows, and the eyebrows will be moved by their own bones.
Edit: Select the head object and in the Object panel > Relations, remove the parent, now it's the Deform option that will act (through the Armature modifier). Also remove the eyebrows vertices from all groups (select them and on the right of the vertex groups list, click on the down arrow button and Remove from All Groups) and assign them to the eyebrows bones vertex groups.