fix wrong instance name

modules/clan/stirling-pdf/tests/vm/default.nix

@@ -10,7 +10,7 @@
       machines.server = { };
 
       instances = {
-        actual-budget-test = {
+        stirling-pdf-test = {
           module.name = "@clan/stirling-pdf";
           module.input = "self";
           roles.default.machines."server".settings = { };