workflows: step.sleep takes the number argument as milliseconds

I tested and noticed this issue.

Author: Func86

src/content/docs/workflows/build/sleeping-and-retrying.mdx

@@ -26,7 +26,7 @@ Use `step.sleep` to have a Workflow sleep for a relative period of time:
 await step.sleep("sleep for a bit", "1 hour")
 ```
 
-The second argument to `step.sleep` accepts both `number` (seconds) or a human-readable format, such as "1 minute" or "26 hours". The accepted units for `step.sleep` when used this way are as follows:
+The second argument to `step.sleep` accepts both `number` (milliseconds) or a human-readable format, such as "1 minute" or "26 hours". The accepted units for `step.sleep` when used this way are as follows:
 
 ```ts
 | "second"