Merge pull request #450 from melooooooooooo/3bp_revision

docs: added revision docs on rock 3b

docs/rock3/rock3b/hardware-design/revision.md

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+---
+sidebar_position: 2
+---
+
+# 改版详情
+
+## ROCK 3B+
+
+**ROCK 3B+ 是基于 ROCK 3B 的 V1.51 版本的基础上修改**
+
+- 将版本丝印更改为 V1.6。
+- eMMC B2B 连接器更改为板载 eMMC。
+- 在 ADC 上增加电压检测功能。
+- M.2 E Key 和 M.2 B Key 的固定铜柱改为 2.7mm。
+- 删除 R140，优化设计以避免为普通电池充电。
+- PCB 板厚更改为 1.6mm。
+- 优化 SIM 卡槽选型。
+

i18n/en/docusaurus-plugin-content-docs/current/rock3/rock3b/hardware-design/revision.md

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+---
+sidebar_position: 2
+---
+
+# Revision Details
+
+## ROCK 3B+
+
+**The ROCK 3B+ is based on the V1.51 version of the ROCK 3B with modifications**
+
+- Changed the version silk screen to V1.6.
+- Replaced the eMMC B2B connector with onboard eMMC.
+- Added voltage detection functionality to the ADC.
+- Changed the fixed copper pillars for M.2 E Key and M.2 B Key to 2.7mm.
+- Removed R140 and optimized the design to prevent charging standard batteries.
+- Changed the PCB thickness to 1.6mm.
+- Optimized the selection of the SIM card slot.
+