docs: fix step name in long-running workflow documentation (#12215)

* docs: fix step name in long-running workflow documentation

Fixed inconsistency in the step name - updated 'set-step-failure-step' to 'setStepFailureStep' to match the exported function name.

Fixes #12143

* docs: fix step name in long-running workflow documentation

Changed the step ID from "setStepFailureStep" to "set-step-failure-step" as requested to follow kebab-case naming convention for step IDs.

Fixes #12143

* Update page.mdx

I think this is done. Sorry for inconvenience caused by me.

* Update page.mdx

Sorry for the inconvenience.

* Update page.mdx

Sorry for the inconvenience.

* Update page.mdx

---------

Co-authored-by: Your Name <your-email@example.com>

www/apps/book/app/learn/fundamentals/workflows/long-running-workflow/page.mdx

@@ -252,7 +252,7 @@ type SetStepFailureStepInput = {
 };
 
 export const setStepFailureStep = createStep(
-  "set-step-success-step",
+  "set-step-failure-step",
   async function (
     { transactionId }: SetStepFailureStepInput,
     { container }