[4] Remove use of deprecated triggerEvent call

[PhilETaylor]

Pull Request for Issue # .

Summary of Changes

Remove use of deprecated triggerEvent call in favour of a Joomla 4 way of dispatching events

Testing Instructions

Load Home Dashboard in Joomla 4 freshly installed. Note the sample plugins are all listed in the Sample data plugin

Actual result BEFORE applying this Pull Request

Load Home Dashboard in Joomla 4 freshly installed. Note the sample plugins are all listed in the Sample data plugin

Expected result AFTER applying this Pull Request

Load Home Dashboard in Joomla 4 freshly installed. Note the sample plugins are all listed in the Sample data plugin

Documentation Changes Required

None. Code review only.

[brianteeman]

I have tested this item 🔴 unsuccessfully on 098c835

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/33166.}

[brianteeman]

When you have no sampledata plugins enabled then you get this error

Warning: array_filter() expects parameter 1 to be array, null given in C:\htdocs\joomla-cms\administrator\modules\mod_sampledata\mod_sampledata.php on line 15

[YatharthVyas]

I have tested this item ✅ successfully on 3660973

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/33166.}

[anibalsanchez]

I have tested this item ✅ successfully on 3660973

Test OK

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/33166.}

[Quy]

RTC

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/33166.}

[chmst]

Thanks!