[4.1] Fix quote markup in language string

[Quy]

Summary of Changes

Quotes that are not starting/ending in the language string should be escaped.

Testing Instructions

Code review.
or
Go to System > Administrator Templates
Create a Child Template.
In the list, view page source.

Actual result BEFORE applying this Pull Request

Child of <strong class=text-capitalize text-light>cassiopeia</strong>

Expected result AFTER applying this Pull Request

Child of <strong class="text-capitalize text-light">cassiopeia</strong>

[brianteeman]

I have tested this item ✅ successfully on f62a678

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/36173.}

[infograf768]

I have tested this item ✅ successfully on f62a678

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/36173.}

[infograf768]

rtc

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/36173.}

[bembelimen]

Thx