docs: update changelog for media-image-node type casting fix

Updated the changelog to document the fix for the type casting issue in the media-image-node component where `(props.attributes as any).alt` was replaced with proper type casting.

Co-authored-by: Ziad Beyens <[email protected]>

Author: claude[bot]

docs/components/changelog.mdx

@@ -10,6 +10,9 @@ Use the [CLI](https://platejs.org/docs/components/cli) to install the latest ver
 
 ## June 2025 #23
 
+### June 29 #23.8
+- `media-image-node`: Fixed type casting issue where `(props.attributes as any).alt` was replaced with proper type casting using `TImageElementWithAlt` interface
+
 ### June 26 #23.7
 - `inline-combobox`: Fixed combobox not closing when clicking outside the editor