tests: internal: config_map: fix test for mult_slist
Since `FLB_CONFIG_MAP_SLIST_4` requires 4 strings at least, we
need to pass something like "a b c d", not "a b c".
This should fix the CI failure occurring on
@@ -272,7 +272,7 @@ void test_multiple()
flb_kv_item_create(&prop, "mult_clist", "d, e, f");
flb_kv_item_create(&prop, "mult_clist", "g, h, i");
- flb_kv_item_create(&prop, "mult_slist", "d e f");
+ flb_kv_item_create(&prop, "mult_slist", "d e f g");
map = flb_config_map_create(config_map_mult);
TEST_CHECK(map != NULL);
