Fix spelling errors
inuxkit/kernel -> linuxkit/kernel
sourcs -> sources
# This builds the supported LinuxKit kernels. Kernels are wrapped up
# in a scratch container, which contains the bzImage, a tar
-# ball with modules, the kernel sourcs, and in some case, the perf binary.
+# ball with modules, the kernel sources, and in some case, the perf binary.
#
# Each kernel is pushed to hub twice, once as
# linuxkit/kernel:<kernel>.<major>.<minor>-<hash> and once as
-# inuxkit/kernel:<kernel>.<major>.x. The <hash> is the git tree hash
+# linuxkit/kernel:<kernel>.<major>.x. The <hash> is the git tree hash
# of the current directory. The build will only rebuild the kernel
# image if the git tree hash changed.
#
