fix: lowercase the index name

Author: 0x0elliot

db-connector.go

@@ -13301,7 +13301,7 @@ func SetDatastoreKeyBulk(ctx context.Context, allKeys []CacheKeyData) ([]Datasto
 
 			meta := map[string]map[string]string{
 				"index": {
-					"_index": GetESIndexPrefix(nameKey),
+					"_index": strings.ToLower(GetESIndexPrefix(nameKey)),
 					"_id":    cacheId,
 				},
 			}