Rollup merge of #128615 - notriddle:notriddle/anchor-a11y, r=GuillaumeGomez

rustdoc: make the hover trail for doc anchors a bit bigger

https://rust-lang.zulipchat.com/#narrow/stream/266220-t-rustdoc/topic/Weird.20markdown.20heading.20rendering.3F

r? ```@GuillaumeGomez```

### Screenshots (the purple part is the padding, which the mouse can pass through to hover over it)

| Before | After |
|--|--|
| ![image](https://github.com/user-attachments/assets/5070eebe-84ac-4f5d-8950-58664370191c) | ![image](https://github.com/user-attachments/assets/55340161-ad8a-41bd-a120-8cdab11f4af0)
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Matthias Krüger 2024-08-04 11:32:36 +02:00 committed by GitHub
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@ -930,7 +930,7 @@ a.doc-anchor {
left: -17px;
/* We add this padding so that when the cursor moves from the heading's text to the anchor,
the anchor doesn't disappear. */
padding-right: 5px;
padding-right: 10px;
/* And this padding is used to make the anchor larger and easier to click on. */
padding-left: 3px;
}