Change "Merge when ready" text to "Enqueue" or "Add to merge queue"

I have a PR with all checks passing, but it shows "Merge when ready"

In other tools "Merge when ready" means "add to a queue when PR checks pass".

Here, it means "it will merge when it CI passes in the merge queue once you press this button enqueue it", which is a quite complex concept.

Can it be named "Add to a queue"?

Start by locating the "Merge when ready" text in the gh-stack repository and read the surrounding code to understand where the label is defined. Change the wording to the requested queue terminology, then verify that the displayed action communicates enqueueing a pull request rather than immediate merging.

Written by the indexing model from the issue text.