Undocumented Behavior: `hx-boost` will honor any `hx-swap` attribute it found on the DOM tree

Hi, I hope this issue finds you well.

I just want to report a little bit of undocumented behavior as far as I can tell (at the very least, I don't think I found any mention of this specific behavior on [htmx.org/docs](https://htmx.org/docs/#boosting)).

The issue specifically is about the `hx-boost` behavior on an anchor tag. If on the way to the root/parent of the DOM, you find any `hx-swap` attribute, it will honor that attribute during swapping.

For example the following code:
```html

• 
  Title
  

```
Will not swap the ``. But instead will append the `innerHTML` of the response body after the pre-existing body. like this:
```html

• 
  Title
  

```
Just like the behavior of `afterend`.

This behavior can be fixed by specifying `hx-swap` attribute alongside the `hx-boost` to the default (`innerHTML`) or even similar behavior (such as `outerHTML`) like this:
```html
Title
```

However there does not seem to be any difference when using either `innerHTML` or `outerHTML`.

I won't exactly specify this as a bug, as it makes sense that `hx-boost` is in a way shared behavior with `hx-get`. Though it does not seem to be documented anywhere and it took me quite some time to identify this issue.

Hope that it helps. Thanks!!

Start with the htmx.org/docs/#boosting section mentioned in the issue and verify how hx-boost interacts with an inherited hx-swap attribute. Document the behavior with the provided example and explain the available override; done means the behavior is discoverable in the boosting documentation.

Written by the indexing model from the issue text.