doc: fix hyperlink in igc guide
doc: fix hyperlink in igc guide

The hyperlink in the IGC documentation showed the whole link in italics
and was not clickable. This is now fixed to have a clickable label.

Fixes: 66fde1b943eb ("net/igc: add skeleton")
Cc: stable@dpdk.org

Signed-off-by: Ciara Power <2dd8f648091a527a3f34edd30b226be01da76a0e@intel.com>
Acked-by: John McNamara <af31595c36a4239b9676e9b3a777d3e2f15a6c4d@intel.com>
Reviewed-by: Ferruh Yigit <ba8734c3c506d2e3557bd4ac8fdaccd25bdb9aa7@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk