update readme and drop file executable permission

Signed-off-by: Neil Chen <jingsi.chen@petalmail.com>

README.md

@@ -14,15 +14,16 @@ Over the Air \(OTA\) provides the remote device update capability. Your devices
 
 ```
 /base/update/ota_lite
-├── frameworks        # OTA update implementation, including update package parsing, verification, writing, and updating
-│   └── test          # Self-test code
-│   └── unittest      # Unit test code
-│   └── source        # updater module source code
-│       └── updater   # updater module code
-│       └── verify    # Verification algorithm code
-├── interfaces
-│   └── kits          # External APIs for OTA update
-├── hals              # Chip adaptation code, for example, HiSilicon chip adaptation code is located at device\hisilicon\hardware\update
+.
+├── frameworks         # OTA update implementation, including update package parsing, verification, writing, and updating
+│   ├── source         # updater module source code
+│   │   ├── updater    # updater module code
+│   │   └── verify     # Verification algorithm code
+│   └── test           # Self-test code
+│       └── unittest   # Unit test code
+├── hals               # Chip adaptation code
+└── interfaces         # External APIs
+    └── kits           # OTA update APIs
 ```
 
 ## Constraints<a name="section1718733212019"></a>

README_zh.md

@@ -14,15 +14,16 @@ OTA（Over the Air）提供对设备远程升级能力，基于提供的接口
 
 ```
 /base/update/ota_lite
-├── frameworks        # OTA升级实现，主要包括升级包解析验证、写入、升级的功能
-│   └── test          # 自测试代码存放目录
-│   └── unittest      # 单元测试代码存放目录
-│   └── source        # updater组件代码存放目录
-│       └── updater   # updater组件代码目录
-│       └── verify    # 效验算法代码目录
-├── interfaces
-│   └── kits          # OTA升级接口,对外接口存放目录
-├── hals              # 芯片适配层，比如实现海思芯片实现位于device\hisilicon\hardware\update
+.
+├── frameworks         # OTA升级实现，主要包括升级包解析验证、写入、升级的功能
+│   ├── source         # updater组件代码存放目录
+│   │   ├── updater    # updater组件代码目录
+│   │   └── verify     # 效验算法代码目录
+│   └── test           # 自测试代码存放目录
+│       └── unittest   # 单元测试代码存放目录
+├── hals               # 芯片适配层
+└── interfaces         # 对外接口存放目录
+    └── kits           # OTA升级接口
 ```
 
 ## 约束<a name="section1718733212019"></a>
@@ -76,7 +77,7 @@ OTA（Over the Air）提供对设备远程升级能力，基于提供的接口
 
 ## 相关仓<a name="section68521336131912"></a>
 
-[升级服务子系统](https://gitee.com/openharmony/docs/blob/master/zh-cn/readme/%E5%8D%87%E7%BA%A7%E6%9C%8D%E5%8A%A1%E5%AD%90%E7%B3%BB%E7%BB%9F.md)
+[升级子系统](https://gitee.com/openharmony/docs/blob/master/zh-cn/readme/%E5%8D%87%E7%BA%A7%E5%AD%90%E7%B3%BB%E7%BB%9F.md)
 
 **update\_ota\_lite**