Change logs for ipxe source package in Nile V2.0

ipxe (1.21.1+git-20220113.fbbdc3926-ok2) nile; urgency=medium

  * Fix building push

 -- liubo01 <email address hidden>  Wed, 19 Jun 2024 17:54:00 +0800

ipxe (1.21.1+git-20220113.fbbdc3926-ok1) nile; urgency=medium

  * Build for openkylin.

 -- Luoyaoming <email address hidden>  Fri, 17 May 2024 14:55:33 +0800

ipxe (1.0.0+git-20190109.133f4c4-ok1build1) yangtze; urgency=medium

  * update changelog

 -- Cong Liu <email address hidden>  Mon, 21 Nov 2022 10:57:48 +0800