Docs: proc: fix kernel version
Docs: proc: fix kernel version

Change the kernel version in table 1-2 from 3.20 to 4.1

Signed-off-by: Chen Hanxiao <818f8a165c25fa146ecad28e2ef3e3fb996fa364@cn.fujitsu.com>
Reviewed-by: Nathan Scott <e2e3f1f24cbc439f8c1ba9b08f9954237d64be64@redhat.com>
Signed-off-by: Jonathan Corbet <b2ce64d5587c02f12e367eac59751145a0660c51@lwn.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs