[3.9][a11y] Improve accessiblity in mod_finder

[wojsmol]

Pull Request for Issue # .

Summary of Changes

Added role="search" attribute to the form tag

Testing Instructions

• code inspection
• use screen reader (e.g. NVDA) and see that the search form is accessible during navigation as a landmark

Expected result

Attribute role="search" defines one of the landmarks of the page. This allows the user of assistive technology to easily navigate to the finder module.

Actual result

Assistive technology does not recognize the form as a landmark.

Documentation Changes Required

no

[chmst]

I have tested this item ✅ successfully on da0c2d2

Tested with code inspection

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[zwiastunsw]

I have tested this item ✅ successfully on da0c2d2

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/23693.}

[Quy]

RTC

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[HLeithner]

thx