doc: update release notes for Windows support
doc: update release notes for Windows support

Added documentation for Windows support on 19.05 release.

Signed-off-by: Pallavi Kadam <04c73ddce9f45f6664a05521f1a0d9e2539b2e10@intel.com>
Reviewed-by: Anand Rawat <2bbba6ce87644c78256aee971b80b6711e3582f5@intel.com>
Reviewed-by: Ranjit Menon <d9858831bd71ea8654d16047dffcc62a10524416@intel.com>
Acked-by: John McNamara <af31595c36a4239b9676e9b3a777d3e2f15a6c4d@intel.com>

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