os/gtime: issue title polaris configuration center, only supports json data and does not support other file types (such as: yaml)

[sharpleafage]

Go version

go.1.23

GoFrame version

gf >=2.8.0

Can this bug be reproduced with the latest release?

Option Yes

What did you do?

dev

What did you see happen?

加载配置中心的问题，
gf >=2.8.0

func (c *Client) doUpdate(ctx context.Context) (err error) {
	if !c.client.HasContent() {
		return gerror.New("config file is empty")
	}
	var j *gjson.Json
	if j, err = gjson.DecodeToJson([]byte(c.client.GetContent())); err != nil {
		return gerror.Wrap(err, `parse config map item from polaris failed`)
	}
	c.value.Set(j)
	return nil
}

gf <2.8.0

func (c *Client) doUpdate(ctx context.Context) (err error) {
	if !c.client.HasContent() {
		return gerror.New("config file is empty")
	}
	var j *gjson.Json
	if j, err = gjson.LoadContent(c.client.GetContent()); err != nil {
		return gerror.Wrap(err, `parse config map item from polaris failed`)
	}
	c.value.Set(j)
	return nil
}

//bug
 gjson.DecodeToJson([]byte(c.client.GetContent())); 

What did you expect to see?

解决bug

[sharpleafage]

按照文档 ，代码行不通， gf2.7版本，可以行的通
https://goframe.org/docs/micro-service/config-service

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---

According to the documentation, the code does not work, but in gf2.7 version, it does.
https://goframe.org/docs/micro-service/config-service