Embed blocks: figcaption inserted via toolbar not nested within figure element

[frkly]

Description

Feature 'Embed Block caption' is not working properly. I expect the figcaption to be output as a child element of the figure, but it is currently being inserted as a sibling element after the figure instead.

Step-by-step reproduction instructions

1. Install Gutenberg version 19.1.0.
2. Open Gutenberg and paste a YouTube video URL into the visual editor.
3. Add a figcaption via the toolbar.
4. Inspect the figcaption using Chrome Dev Tools. You'll see that the figcaption is placed outside of the figure element.

Screenshots, screen recording, code snippet

c208e6b82ccd707d28d5d5ae607f56d1.mp4

Environment info

1. Gutenberg version 19.1.0
2. WordPress 6.6.1
3. Chrome 128.0.6613.86(Official Build)
4. Windows 11

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

• Yes

[hbhalodia]

Hi @frkly @t-hamano, I have raised the PR to fix the same - #64970.

Thank You,

[t-hamano]

Fixed by #64970