docs: revise examples to use --no_confirm option for commit messages

- Update example commands to use the --no_confirm option instead of --preview
- Revise example descriptions to indicate that commit messages are generated without confirmation
- Add --no_confirm to the Chinese commit message example

Signed-off-by: appleboy <[email protected]>

Author: appleboy

skills/commit-helper/SKILL.md

@@ -121,20 +121,20 @@ output:
 
 ## Examples
 
-### Example 1: Basic commit with preview
+### Example 1: Basic commit without preview
 
 ```bash
 # Stage your changes
 git add .
 
-# Generate and preview commit message
-codegpt commit --preview
+# Generate commit message without confirmation
+codegpt commit --no_confirm
 ```
 
 ### Example 2: Chinese commit message
 
 ```bash
-codegpt commit --lang zh-tw --model gpt-4o
+codegpt commit --lang zh-tw --model gpt-4o --no_confirm
 ```
 
 ### Example 3: Custom template