add release notes for 5.0.1
(From yocto-docs rev: 9ca8ae1aae8d98ca2c9d2e67b3e07b49de9c20f6)
Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>
Reviewed-by: Andrew Murray <amurray@thegoodpenguin.co.uk>
Reviewed-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
