Update release notes with feature of outer IP hash for GTPC and GTPU.
Fixes: 6cd2d6adc783 ("net/iavf: support outer IP hash for GTPC")
Fixes: 262100a34a38 ("net/iavf: support outer IP hash for no inner GTPU")
Signed-off-by: Alvin Zhang <alvinx.zhang@intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
6fda724378