[mod_syndicate] Always use htmlspecialchars($str, ENT_COMPAT, 'UTF-8')

[zero-24]

Pull Request for Issue #10399 .

Summary of Changes

Always use htmlspecialchars($str, ENT_COMPAT, 'UTF-8')

Testing Instructions

• Enable the mod_syndicate module to the frontend
• see that it works
• apply this patch
• see that it still works

[brianteeman]

I have tested this item ✅ successfully on b5a44f3

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[BurtNL]

I have tested this item ✅ successfully on b5a44f3

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_{This comment was created with the J!Tracker Application at issues.joomla.org/joomla-cms/10407.}

[brianteeman]

RTC

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