Improve docs on Modals, Alerts, Offcanvas and Toasts close triggers e…

…xamples (#38182)

* Improve docs on Modals, Alerts, Offcanvas and Toasts close triggers examples

* Update site/layouts/shortcodes/js-dismiss.html

Co-authored-by: Julien Déramond <juderamond@gmail.com>

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Co-authored-by: Mark Otto <markdotto@gmail.com>
Co-authored-by: Julien Déramond <juderamond@gmail.com>

site/layouts/shortcodes/js-dismiss.html

@@ -2,13 +2,13 @@
 
 {{- $name := .Get 0 -}}
 
-Dismissal can be achieved with the `data` attribute on a button **within the {{ $name }}** as demonstrated below:
+Dismissal can be achieved with the `data-bs-dismiss` attribute on a button **within the {{ $name }}** as demonstrated below:
 
 ```html
 <button type="button" class="btn-close" data-bs-dismiss="{{ $name }}" aria-label="Close"></button>
 ```
 
-or on a button **outside the {{ $name }}** using the `data-bs-target` as demonstrated below:
+or on a button **outside the {{ $name }}** using the additional `data-bs-target` as demonstrated below:
 
 ```html
 <button type="button" class="btn-close" data-bs-dismiss="{{ $name }}" data-bs-target="#my-{{ $name }}" aria-label="Close"></button>