Fixed a documentation typo

modules/juce_core/maths/juce_NormalisableRange.h

@@ -267,7 +267,7 @@ private:
     {
         auto clampedValue = jlimit (static_cast<ValueType> (0), static_cast<ValueType> (1), value);
 
-        // If you his this assertion then either your normalisation function is not working
+        // If you hit this assertion then either your normalisation function is not working
         // correctly or your input is out of the expected bounds.
         jassert (clampedValue == value);