Added comment to Time::getCurrentTime() to make clear that it is not required to be monotonic.

modules/juce_core/time/juce_Time.h

@@ -99,6 +99,9 @@ public:
     //==============================================================================
     /** Returns a Time object that is set to the current system time.
 
+        This may not be monotonic, as the system time can change at any moment.
+        You should therefore not use this method for measuring time intervals.
+
         @see currentTimeMillis
     */
     static Time JUCE_CALLTYPE getCurrentTime() noexcept;