How to "make target/linux/update" (or equivalent)?

I am trying to do iterative kernel changes, as per instructions here. At the bottom, step 9 is to:
9. Finally run make package/example/update or make target/linux/update for kernels to copy the changes back to build system
This results in the error that there is no rule to make "update". What is the correct command to copy the changes back to the build system and incorporate it into the image?