wp: Fix data source vars test.

Typo in new field name "input_variables" was fixed. The # of variables also has changed since `waypoint_application` is counted among the variables.

internal/provider/waypoint/data_source_waypoint_application_test.go

@@ -70,7 +70,7 @@ func TestAccWaypoint_Application_DataSource_WithInputVars(t *testing.T) {
 				Config: testDataApplicationWithInputVarsConfig(templateName, applicationName),
 				Check: resource.ComposeTestCheckFunc(
 					resource.TestCheckResourceAttr(dataSourceName, "name", applicationName),
-					resource.TestCheckResourceAttr(dataSourceName, "input_vars.#", "2"),
+					resource.TestCheckResourceAttr(dataSourceName, "input_variables.#", "3"),
 				),
 			},
 		},