Currently, the geometry nodes modifier always creates a time dependency
if there is a bake animation node, even if there is no bake. Changing this is
not entirely trivial, because it is only known during evaluation if there is baked
data. Making `Still` the default works around that issue in many cases where
the Bake node is in a node group asset that does not depend on time.
Furthermore, it's nice to have the "cheaper" version of the node by default,
which is baking a single frame, instead of baking everything.
Pull Request: https://projects.blender.org/blender/blender/pulls/117999