[6.0] Automated Update Quickicon language keys and icon

[obuisard]

Summary of Changes

This PR changes a few language keys and replaces the icon to avoid portraying 'health' status for automated updates because we will later use 'health' and icons representing health for the Health Checker upcoming feature.

Testing Instructions

Install and check the status of the automated updates.
The check should fail.
The description of the quickicon is also impacted.

Actual result BEFORE applying this Pull Request

The user may be lead to think the whole system is at risk (there is no notion of automated updates).

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

[exlemor]

I have tested this item ✅ successfully on bd06a5e

I have tested this successfully.

Merci @obuisard!

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/45614.}

[tecpromotion]

I have tested this item ✅ successfully on bd06a5e

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/45614.}

[tecpromotion]

RTC

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/45614.}