Describe the bug

After editing a link, the font style is removed.

Content before changing:
<p><a target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"http://foo.de\"><span style=\"font-size: 30px\">Bar</span></a></p>

Content after changing:
<p> <a target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"http://foo.de\">Bar/a></p>

The same behaviour is in the TipTap Showcase.

To Reproduce

Add a Link and give it a specific font size.
Edit the link, after you saved the changes, the font size is reseted.

Expected behavior

The font style should be kept

System (please complete the following information)

mui-tiptap version: 1.9.1
tiptap version: 2.4.0
Browser: Chrome