Docs: Update markdown based shortcode for card elements

[marcduiker]

Description

This change fixes the rendering in the 1.16 docs. The inner card element contains Markdown formatting and should therefore use the %. The card is then rendered as HTML so the outer cardpanel should remain using <>.

Issue reference

Please reference the issue this PR will close: #[issue number]

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 57.12%. Comparing base (6c59092) to head (318b5dd).
⚠️ Report is 35 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (6c59092) and HEAD (318b5dd). Click for more details.

HEAD has 3 uploads less than BASE

Flag	BASE (6c59092)	HEAD (318b5dd)
	4	1

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #771      +/-   ##
==========================================
- Coverage   62.52%   57.12%   -5.41%     
==========================================
  Files          56       58       +2     
  Lines        4139     4450     +311     
==========================================
- Hits         2588     2542      -46     
- Misses       1425     1771     +346     
- Partials      126      137      +11     

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[marcduiker]

Replaced with #772