fix cluster list sorting

pkg/es/cluster.go

@@ -21,6 +21,7 @@ import (
 	"errors"
 	"fmt"
 	"log/slog"
+	"slices"
 	"sync"
 
 	"codeberg.org/scip/esctl/pkg/cfg"
@@ -92,8 +93,20 @@ func ClusterList(conf *cfg.Config) error {
 	table.Addheaders("cluster", "uri", "default")
 
 	idx := 0
-	for name, cluster := range conf.Clusters {
+
+	names := make([]string, len(conf.Clusters))
+	for name := range conf.Clusters {
+		names[idx] = name
+		idx++
+	}
+
+	slices.Sort(names)
+
+	idx = 0
+
+	for idx, name := range names {
 		current := name == "default" || name == conf.CurrentCluster
+		cluster := conf.Clusters[name]
 
 		_, err := cluster.ES.Cluster.Health().
 			Header("content-type", "application/json").
@@ -108,7 +121,6 @@ func ClusterList(conf *cfg.Config) error {
 		idx++
 	}
 
-	table.Sort()
 	if err := table.PrintMarkdown(); err != nil {
 		return err
 	}