nilrt.conf: Update to 20.7
nilrt.conf: Update to 20.7

Signed-off-by: James Minor <8d7e6579c8b6fe6b98ecff08c8adeb0c6baca5ae@ni.com>

ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt