Unnecessary sed substitution for SUBNET in kubelet-config.yaml

[elafkaihi]

Description

In the worker nodes bootstrapping step, the following command is used:

sed "s|SUBNET|$SUBNET|g" \
  configs/kubelet-config.yaml > kubelet-config.yaml

However, configs/kubelet-config.yaml does not contain any SUBNET
placeholder, making this sed substitution a no-op, the output file
is identical to the source template.

Expected behavior

Either:

• Remove the sed substitution and copy the file directly
• Or add the SUBNET placeholder in the template if it was intentional

[hiSandog]

The current substitution does appear to be a no-op, so replacing it with an explicit copy would make the bootstrap step less misleading. It may also be worth adding a small documentation check that fails when a template-processing command names a placeholder not present in its source file. That would catch future drift between the guide and config templates.