fix: explain the reason for using rknext

Signed-off-by: Nascs Fang <[email protected]>

Author: nascs

docs/common/dev/_custom_logo.mdx

@@ -1,5 +1,13 @@
 ### 确认 U-boot 是否是 rknext
 
+由于目前我们只在 rknext 中集成了该功能， 所以需要确认手中板子的 U-boot 是否是 2024 年 10 月份之后的版本，
+
+如：
+
+```bash
+U-Boot SPL latest-2023.07.02-6-4257d241-g4257d241 (Oct 12 2023 - 07:58:46 +0000)
+```
+
 ### 准备一张或者两张图片
 
 ### 将图片转为 .bmp 格式

i18n/en/docusaurus-plugin-content-docs/current/common/dev/_custom_logo.mdx

@@ -1,4 +1,12 @@
-### Verify that U-boot is rknext
+### Verify that the U-boot is rknext
+
+Since we have only integrated this feature in rknext, you need to check if the U-boot on your board is from October 2024 onwards.
+
+For example:
+
+```bash
+U-Boot SPL latest-2023.07.02-6-4257d241-g4257d241 (Oct 12 2023 - 07:58:46 +0000)
+```
 
 ### Prepare one or two images