feat: e52c: add picture how to operate into maskrom

Signed-off-by: Mitchell Ma <[email protected]>

docs/e/e52c/getting-started/install-os/maskrom/_maskrom.mdx

@@ -21,9 +21,23 @@ Maskrom模式，也称为Loader模式，是一种特殊的启动模式，一般
 
 ### 如何进入Maskrom 状态
 
-- 将 USB A-A 电缆插入 E52C 的 USB 3.0 OTG/HOST Type-A 端口，另一端插入电脑。
-- 按住 **Maskrom button**
+![MaskRom Key](/img/e/e52c/radxa-e52c-hardware-overview.webp)
+
+- 准备一根 USB A-A 的线缆，如下图所示
+
+![MaskRom Key](/img/e/e52c/radxa-e52c-maskrom-a-a-cable.webp)
+
+- 首先将 USB A-A 电缆插入 E52C 的 USB 3.0 OTG/HOST Type-A 端口，另一端插入电脑。
+
+![MaskRom Key](/img/e/e52c/radxa-e52c-maskrom-1.webp)
+
+- 然后按住 **Maskrom button**
+
+![MaskRom Key](/img/e/e52c/radxa-e52c-maskrom-2.webp)
+
 - 上电 （将 USB A-C 电缆插入 E52C 的 Type-C Power端口，另一端接入电源。）
+
+![MaskRom Key](/img/e/e52c/radxa-e52c-maskrom-3.webp)
+
 - 此时正常情况下会进入 Maskrom 状态
 
-![MaskRom Key](/img/e/e52c/radxa-e52c-hardware-overview.webp)

i18n/en/docusaurus-plugin-content-docs/current/e/e52c/getting-started/install-os/maskrom/_maskrom.mdx

@@ -24,9 +24,22 @@
 
 ### How to enter Maskrom state
 
-- Plug the USB A-A cable into the USB 3.0 OTG/HOST Type-A port of the E52C and the other end into your computer.
-- Press and hold the **Maskrom button**(see picture below)
+![MaskRom Key](/img/e/e52c/radxa-e52c-hardware-overview.webp)
+
+- Prepare a USB A-A cable as shown below
+
+![MaskRom Key](/img/e/e52c/radxa-e52c-maskrom-a-a-cable.webp)
+
+- First plug the USB A-A cable into the USB 3.0 OTG/HOST Type-A port of the E52C and the other end into your computer.
+
+![MaskRom Key](/img/e/e52c/radxa-e52c-maskrom-1.webp)
+
+- Then press and hold the **Maskrom button**.
+
+![MaskRom Key](/img/e/e52c/radxa-e52c-maskrom-2.webp)
+
 - Power Up (Plug the USB A-C cable into the E52C's Type-C Power port and the other end into a power source.)
-- This will normally enter the Maskrom state
 
-![MaskRom Key](/img/e/e52c/radxa-e52c-hardware-overview.webp)
+![MaskRom Key](/img/e/e52c/radxa-e52c-maskrom-3.webp)
+
+- This will normally enter the Maskrom state