fix: Add a missing word to tooltip (#16198)

Author: ShireenMissi

packages/frontend/@n8n/i18n/src/locales/en.json

@@ -2442,7 +2442,7 @@
 	"workflowSettings.defaultTimezoneNotValid": "Default Timezone not valid",
 	"workflowSettings.errorWorkflow": "Error Workflow",
 	"workflowSettings.executionOrder": "Execution Order",
-	"workflowSettings.helpTexts.errorWorkflow": "A second workflow to run if the current one fails.<br />The second workflow should an 'Error Trigger' node.",
+	"workflowSettings.helpTexts.errorWorkflow": "A second workflow to run if the current one fails.<br />The second workflow should have an 'Error Trigger' node.",
 	"workflowSettings.helpTexts.executionTimeout": "How long the workflow should wait before timing out",
 	"workflowSettings.helpTexts.executionTimeoutToggle": "Whether to cancel workflow execution after a defined time",
 	"workflowSettings.helpTexts.saveDataErrorExecution": "Whether to save data of executions that fail",