[5.4] Underline links [a11y]

[brianteeman]

Pull Request for Issue # .

Summary of Changes

Links inside alerts do not get underlined

Testing Instructions

Easiest test is to install this plugin https://github.com/brianteeman/slashtools/releases/tag/1.0.2
On install an alert is displayed but you cannot "see" the link

Actual result BEFORE applying this Pull Request

Expected result AFTER applying this Pull Request

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[travisrisner]

I have tested this item ✅ successfully on 588443b

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[exlemor]

I have tested this item ✅ successfully on 588443b

Tested this super easy PR successfully. Thanks @brianteeman!

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/46298.}

[QuyTon]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/46298.}

[muhme]

✅ 46298 Final test with JBT before merge: No underscore for link

• Applied PR with gh pr checkout 46298 and npm ci – the link is now underscored

[muhme]

Thank you @brianteeman for your contribution. Thank you @travisrisner and @exlemor for testing.