Shows a link in the warning

[andizer]

Summary

This PR can be summarized in the following changelog entry:

• [@yoast/schema-blocks] Fixes a bug where the link to additional information in the warning was missing.

Test instructions

This PR can be tested by following these steps:

• Test this against P2 690 expose shortlinks wordpress-seo#16822 and the trunk of Yoast SEO Premium.
• Add the jobs block to a post
• Remove the title or description. You will see an error with a link. Navigate to that link and see that you get navigated to the yoast.com help page. The page itself probably doesn't exist yet. But the url should be like this https://yoast.com/help/required-recommended-optional-fields.... with some additional UTM tags. Note the &utm_term=required%20block
• Now remove the requirements block for example
• You will get an warning about the removal of a recommended block. This block also should have a link that navigates to https://yoast.com/help/required-recommended-optional-fields.... and see that there is a utm_term=recommended%20block

Impact check

• This PR affects the following parts of the plugin, which may require extra testing:
  *

UI changes

• This PR changes the UI in the plugin. I have added the 'UI change' label to this PR.

Quality assurance

• I have tested this code to the best of my abilities
• I have added unittests to verify the code works as intended

Fixes #

[hansjovis]

Acceptance test: 🚫

Link is not blue, so not according to the design.

For sake of expediency I fixed it myself.