[200_22] bump to Mogan STEM v2026.2.1-rc4 (#3006)

Author: GatsbyUSTC

devel/200_22.md

@@ -1,4 +1,7 @@
 # 200_22: 设计一套方案，可以方便的打包 Mogan STEM 和 Liii STEM
+
+## 2026/03/18 v2026.2.1-rc4    打包
+
 ## 2026/03/17 v2026.2.1-rc3    打包
 
 ## 2026/03/05 v2026.2.1-rc2    打包

xmake/vars.lua

@@ -9,7 +9,7 @@
 -- It comes WITHOUT ANY WARRANTY WHATSOEVER. For details, see the file LICENSE
 -- in the root directory or <http://www.gnu.org/licenses/gpl-3.0.html>.
 
-XMACS_VERSION="2026.2.1-rc3"
+XMACS_VERSION="2026.2.1-rc4"
 TEXMACS_VERSION = "2.1.2"
 GOLDFISH_VERSION = "17.11.2"
 DEVEL_VERSION = TEXMACS_VERSION