caretaker note: docs only change, no need of presubmitting it

This PR was merged into the repository by commit 8d050b5.

The changes were merged into the following branches: main

Hi @pkozlowski-opensource
In the linked_signal.ts, the advanced version of linkedSignal still has @developerPreview annotation, but based on changes in linked-signal.md can be assumed that linkedSignal in general, is now stable as the removed information about the dev preview applied to the entire file.
I'd appreciate information if the remaining @developerPreview annotation should also be removed or if the advanced version is still considered unstable.

@pawelfras It's an oversight, we'll fix it.

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