getCache should link to JCacheController

[photodude]

Pull Request for Issue #10112 .

Summary of Changes

Corrects the link for JFactory::getCache() this method uses JCache::getInstance() which returns a JCacheController instance "decorating" JCache

Testing Instructions

Merge by code review

[bembelimen]

I have tested this item ✅ successfully on 1824377

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[zero-24]

I have tested this item ✅ successfully on 1824377

Thanks.

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_{This comment was created with the J!Tracker Application at issues.joomla.org/joomla-cms/10152.}

[zero-24]

RTC Thanks 😄

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_{This comment was created with the J!Tracker Application at issues.joomla.org/joomla-cms/10152.}