[4.2] Template Override description

[brianteeman]

This fixes a language string error in my own pr #38451

Testing requires overrides that need checking. You can simulate this by

1. Create template overrides for com_content/article and com_newsfeed/feed
2. Run this sql query replacing #_ with your db prefix INSERT INTO #__template_overrides (id, template, hash_id, extension_id, state, action, client_id, created_date, modified_date) VALUES (1, 'cassiopeia', 'L2h0bWwvY29tX25ld3NmZWVkcy9uZXdzZmVlZC9kZWZhdWx0LnBocA==', 223, 0, 'Joomla Update', 0, '2022-09-01 13:51:54', '2022-09-01 13:51:54'), (2, 'cassiopeia', 'L2h0bWwvY29tX2NvbnRlbnQvYXJ0aWNsZS9kZWZhdWx0X2xpbmtzLnBocA==', 223, 0, 'Joomla Update', 0, '2022-09-01 13:51:54', '2022-09-01 13:51:54');

You will now have two override files to update and can test this PR

[chmst]

I have tested this item ✅ successfully on 140924a

code review

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[alikon]

I have tested this item ✅ successfully on 140924a

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[richard67]

RTC

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[fancyFranci]

Thank you!