Add changeset

Author: eps1lon

.changeset/pretty-tigers-brake.md

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+---
+"dom-accessibility-api": patch
+---
+
+Use label attribute for naming of `<optgroup>` elements.
+
+Given
+
+```jsx
+<select>
+	<optgroup label="foo">
+		<option value="1">bar</option>
+	</optgroup>
+</select>
+```
+
+Previously the `<optgroup />` would not have an accessible name.
+Though [2D in `accname` 1.2](https://www.w3.org/TR/accname-1.2/) could be interpreted to use the `label` attribute:
+
+> Otherwise, if the current node's native markup provides an attribute (e.g. title) or element (e.g. HTML label) that defines a text alternative, return that alternative [...]
+
+This was confirmed in NVDA + FireFox.