chore: update CodeGPT to version 0.1.3 in all OS download commands and output

- Update CodeGPT to version 0.1.3 in all OS-specific download commands
- Update version number to 0.1.3 in the `codegpt version` command output

Signed-off-by: Bo-Yi.Wu <appleboy.tw@gmail.com>

Author: appleboy

README.md

@@ -36,32 +36,32 @@ The pre-compiled binaries can be downloaded from [release page](https://github.c
 On linux AMD64
 
 ```sh
-wget -c https://github.com/appleboy/CodeGPT/releases/download/v0.1.2/CodeGPT-0.1.2-linux-amd64 -O codegpt
+wget -c https://github.com/appleboy/CodeGPT/releases/download/v0.1.3/CodeGPT-0.1.3-linux-amd64 -O codegpt
 ```
 
 On macOS (Intel amd64)
 
 ```sh
-wget -c https://github.com/appleboy/CodeGPT/releases/download/v0.1.2/CodeGPT-0.1.2-darwin-amd64 -O codegpt
+wget -c https://github.com/appleboy/CodeGPT/releases/download/v0.1.3/CodeGPT-0.1.3-darwin-amd64 -O codegpt
 ```
 
 On macOS (Apple arm64)
 
 ```sh
-wget -c https://github.com/appleboy/CodeGPT/releases/download/v0.1.2/CodeGPT-0.1.2-darwin-arm64 -O codegpt
+wget -c https://github.com/appleboy/CodeGPT/releases/download/v0.1.3/CodeGPT-0.1.3-darwin-arm64 -O codegpt
 ```
 
 On Windows (AMD64)
 
 ```sh
-wget -c https://github.com/appleboy/CodeGPT/releases/download/v0.1.2/CodeGPT-0.1.2-windows-amd64.exe -O codegpt.exe
+wget -c https://github.com/appleboy/CodeGPT/releases/download/v0.1.3/CodeGPT-0.1.3-windows-amd64.exe -O codegpt.exe
 ```
 
 Change the binary permissions to `755` and copy the binary to the system bin directory. Use the `codegpt` command as shown below.
 
 ```sh
 $ codegpt version
-version: v0.1.2 commit: xxxxxxx
+version: v0.1.3 commit: xxxxxxx
 ```
 
 ## Setup