doc: fix worker.resourceLimits indentation

PR-URL: #30663
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: David Carlier <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>

Author: dnalborczyk

doc/api/worker_threads.md

@@ -157,7 +157,7 @@ console.log(receiveMessageOnPort(port2));
 When this function is used, no `'message'` event will be emitted and the
 `onmessage` listener will not be invoked.
 
-### `worker.resourceLimits`
+## `worker.resourceLimits`
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