use the new wg.Go() function

pkg/es/parallel.go

@@ -19,7 +19,6 @@ package es
 import (
 	"context"
 	"fmt"
-	"sync"
 
 	"codeberg.org/scip/esctl/pkg/cfg"
 	"github.com/elastic/go-elasticsearch/v9"
@@ -64,10 +63,8 @@ type apiResponse struct {
 func getApiData(
 	conf *cfg.Config,
 	es *elasticsearch.TypedClient,
-	wg *sync.WaitGroup,
 	reschan chan apiResponse,
 	which string) {
-	defer wg.Done()
 
 	apiRes := apiResponse{}