[4.2] Code style for cache plugin #36042

[heelc29]

Summary of Changes

Code style for changes in #36042

Testing Instructions

Code review

[richard67]

I have tested this item ✅ successfully on 94b8140

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[Quy]

I have tested this item ✅ successfully on 94b8140

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/37820.}

[Quy]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/37820.}

[roland-d]

Thank you.