Podcast block: Read more link does not work

#### Steps to reproduce the issue

1. Add a podcast block
2. Add a podcast feed link
3. Try to link on the "Read More" link

#### What I expected
I expected the "Read More" to:

- Link to the original post/feed
- Be wrapped as a separate HTML element
- Not be truncated in the ES locale.

#### What happened instead

The "read more" link did not work and looked like this


This happened both on AT and Simple sites

Simple Site: https://juliagomez.es/podcast/
At Site ©https://mystoreadminpractice.blog/podcast-block-atomic-test/

( Feed used in this example: http://juliagomez.es/category/audio/ )

Maybe related to https://github.com/Automattic/jetpack/issues/18591 and https://github.com/Automattic/jetpack/issues/19158

Start with the podcast block and reproduce the issue using the feed link described in the steps, checking the rendered “Read More” link in the default and ES locales. Done means it links to the original post or feed, is wrapped as a separate HTML element, and is not truncated in ES.

Written by the indexing model from the issue text.