message: Fix Apple platform bug in GetTickFrequency
  The numerator and denominator were the wrong way around.
  Discovered running renderdoccmd unit tests on M1 Mac Book Air
diff: @@ -33,7 +33,7 @@ double Timing::GetTickFrequency()
  uint64_t numer = timeInfo.numer;
  uint64_t denom = timeInfo.denom;
  - return ((double)numer / (double)denom) * 1000000.0;
  + return ((double)denom / (double)numer) * 1000000.0;
  }
  uint64_t Timing::GetTick()
  