nginx: upgraded package to upstream

Upgraded www-servers/nginx to version 1.20.1-r3 on amd64

BUG==b:187795307
TEST=sudo emerge nginx

Change-Id: I76f995908c25202df135627ab211fc0a030c4684
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/3654601
Reviewed-by: Ryan Beltran <ryanbeltran@chromium.org>
Commit-Queue: Ryan Beltran <ryanbeltran@chromium.org>
Tested-by: Manoj Gupta <manojgupta@chromium.org>
Auto-Submit: Manoj Gupta <manojgupta@chromium.org>
11 files changed