This commit fixes the documentation so that the API path to get LLDP
neighbors reflect the spelling used in the code. The path in the code
is lldp_neighbours, and in the documentation was lldp_neighbors.
Test plan
[PASS] API paths in documentation are shown as */lldp_neighbours/*
instead of */lldp_neighbors/*
Partial-Bug: #2054707
Change-Id: If1b1dc205b398cf050585c995bbc2ce985b29c40
Signed-off-by: Lucas Ratusznei Fonseca <lucas.ratuszneifonseca@windriver.com>