Prepare release notes for v2.0.0-beta.2

Signed-off-by: Derek McGowan <derek@mcg.dev>

.mailmap

@@ -18,6 +18,7 @@ Arnaud Porterie <icecrime@gmail.com>
 Arnaud Porterie <icecrime@gmail.com> <arnaud.porterie@docker.com>
 Bob Mader <swapdisk@users.noreply.github.com>
 Boris Popovschi <zyqsempai@mail.ru>
+bot <49699333+dependabot[bot]@users.noreply.github.com>
 Bowen Yan <loneybw@gmail.com>
 Brent Baude <bbaude@redhat.com>
 Cao Zhihao <caozhihao@163.com>
@@ -54,7 +55,8 @@ haoyun <yun.hao@daocloud.io>
 Harry Zhang <harryz@hyper.sh> <harryzhang@zju.edu.cn>
 Hu Shuai <hus.fnst@cn.fujitsu.com>
 Hu Shuai <hus.fnst@cn.fujitsu.com> <hushuaiia@qq.com>
-Iceber Gu <wei.cai-nat@daocloud.io>
+Iceber Gu <caiwei95@hotmail.com>
+Iceber Gu <caiwei95@hotmail.com> <wei.cai-nat@daocloud.io>
 Jaana Burcu Dogan <burcujdogan@gmail.com> <jbd@golang.org>
 Jess Valarezo <valarezo.jessica@gmail.com>
 Jess Valarezo <valarezo.jessica@gmail.com> <jessica.valarezo@docker.com>
@@ -177,3 +179,4 @@ Zhoulin Xie <zhoulin.xie@daocloud.io>
 Zhoulin Xie <zhoulin.xie@daocloud.io> <42261994+JoeWrightss@users.noreply.github.com>
 zounengren <zouyee1989@gmail.com> <zounengren@cmss.chinamobile.com>
 张潇 <xiaozhang0210@hotmail.com>
+张钰 <zhang.yu58@zte.com.cn>