doc: announce API change for meter library
doc: announce API change for meter library

Signed-off-by: Cristian Dumitrescu <25468b8a3698eeb3c368247f8635924bb4a1ce2c@intel.com>
Acked-by: John McNamara <af31595c36a4239b9676e9b3a777d3e2f15a6c4d@intel.com>
Acked-by: Jasvinder Singh <97b766ecf460b59e2781d4fc0469065206870f5c@intel.com>
Acked-by: Radu Nicolau <fa459cf59d47c122ba776e9a6f631c862bf44680@intel.com>
Acked-by: David Hunt <763be7c8e0ad91e03160e7aed76d5cd41534e2f9@intel.com>

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