Improve Search in Trash reference to match Discounts Search Reference format

[alongosz]

Question	Answer
JIRA Ticket	n/a
Versions 4.6, 5.0
Edition	OSS+

Related PRs:

• https://github.com/ibexa/documentation-developer-hackaton/pull/8

Description:

This PR improves search in Trash reference, done entirely by copilot.

Checklist

• [ ] Text renders correctly
• [ ] Text has been checked with vale
• [ ] Description metadata is up to date
• [ ] Redirects cover removed/moved pages
• [ ] Code samples are working
• [ ] PHP code samples have been fixed with PHP CS fixer
• [ ] Added link to this PR in relevant JIRA ticket or code PR

[github-actions[bot]]

Preview of modified files

Preview of modified Markdown:

• docs/search/search_in_trash_reference.md