Added support for createImage Azure models (#608)

Author: zjy282

image.go

@@ -68,7 +68,7 @@ type ImageResponseDataInner struct {
 // CreateImage - API call to create an image. This is the main endpoint of the DALL-E API.
 func (c *Client) CreateImage(ctx context.Context, request ImageRequest) (response ImageResponse, err error) {
 	urlSuffix := "/images/generations"
-	req, err := c.newRequest(ctx, http.MethodPost, c.fullURL(urlSuffix), withBody(request))
+	req, err := c.newRequest(ctx, http.MethodPost, c.fullURL(urlSuffix, request.Model), withBody(request))
 	if err != nil {
 		return
 	}