doc: fix typo in coding style
doc: fix typo in coding style

This patch fixes a typo in DPDK Coding Style, in Return Values section,
i.e. replaces "indicated may" with "indicated by".

Fixes: 36032e46be40 ("doc: add coding style")
Cc: stable@dpdk.org

Signed-off-by: Dariusz Sosnowski <c68b5d153e8f63a5f8a9581219907c96b251216e@nvidia.com>
Acked-by: Bruce Richardson <66b9e8e8fbd5e9f41f91b0af050876182ce9d0e4@intel.com>

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