fix: ALI completions api path error

relay/channel/ali/adaptor.go

@@ -33,6 +33,8 @@ func (a *Adaptor) GetRequestURL(info *relaycommon.RelayInfo) (string, error) {
 		fullRequestURL = fmt.Sprintf("%s/api/v1/services/embeddings/text-embedding/text-embedding", info.BaseUrl)
 	case constant.RelayModeImagesGenerations:
 		fullRequestURL = fmt.Sprintf("%s/api/v1/services/aigc/text2image/image-synthesis", info.BaseUrl)
+	case constant.RelayModeCompletions:
+		fullRequestURL = fmt.Sprintf("%s/compatible-mode/v1/completions", info.BaseUrl)
 	default:
 		fullRequestURL = fmt.Sprintf("%s/compatible-mode/v1/chat/completions", info.BaseUrl)
 	}