can-doc: Fix wrong chapter reference
can-doc: Fix wrong chapter reference

In f35f6c8f7 (can: update MAINTAINERS and Documentation) chapter 3.3
was removed. This patch fixes some old references to chapter 3.4 which
no longer exists.

Signed-off-by: Stefan Tatschner <eb0877843acc39f8ef6f7269937dee931c372d23@sevenbyte.org>
Signed-off-by: Jonathan Corbet <b2ce64d5587c02f12e367eac59751145a0660c51@lwn.net>

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