Go: fix CLI logout command (#14672)

### What problem does this PR solve?

```
RAGFlow(user)> logout;
SUCCESS
```

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

internal/cli/common_command.go

@@ -210,10 +210,10 @@ func (c *RAGFlowClient) Logout() (ResponseIf, error) {
 	if c.ServerType == "admin" {
 		path = "/admin/logout"
 	} else {
-		path = "/user/logout"
+		path = "/auth/logout"
 	}
 
-	resp, err := c.HTTPClient.Request("GET", path, "web", nil, nil)
+	resp, err := c.HTTPClient.Request("POST", path, "web", nil, nil)
 	if err != nil {
 		return nil, err
 	}