Update src/Kconfig version to 5.2.1

zhkag · zhkag · commit 57693dc19fbf · 2025-03-28T10:41:54.000+08:00
diff --git a/src/Kconfig b/src/Kconfig
@@ -433,7 +433,7 @@ endif
 
 config RT_VER_NUM
     hex
-    default 0x50200
+    default 0x50201
     help
         RT-Thread version number
 
