minor #20070 [Cache] Add information about clock parameter in ArrayAdapter (jasiolpn)

This PR was merged into the 7.2 branch.

Discussion
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[Cache] Add information about clock parameter in ArrayAdapter

Fixes #20069

Commits
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aec2ec5 Added information about clock parameter in ArrayAdapter

Author: javiereguiluz

components/cache/adapters/array_cache_adapter.rst

@@ -24,5 +24,10 @@ method::
 
         // the maximum number of items that can be stored in the cache. When the limit
         // is reached, cache follows the LRU model (least recently used items are deleted)
-        $maxItems = 0
+        $maxItems = 0,
+
+        // implementation of Psr\Clock\ClockInterface (e.g. Symfony\Component\Clock\Clock)
+        // or null. If clock is provided, cache items lifetime will be calculated
+        // based on time provided by this clock
+        $clock = null
     );