Resolve "Downgrade warning for particles beyond shower axis"

Closes #668 (closed)

corsika/detail/media/ShowerAxis.inl

@@ -65,7 +65,7 @@ namespace corsika {
     unsigned int const upper = lower + 1;
 
     if (fractionalBin < 0) {
-      CORSIKA_LOG_WARN("cannot extrapolate to points behind point of injection l={} m",
+      CORSIKA_LOG_DEBUG("cannot extrapolate to points behind point of injection l={} m",
                        l / 1_m);
       if (throw_) {
         throw std::runtime_error(
@@ -75,7 +75,7 @@ namespace corsika {
     }
 
     if (upper >= X_.size()) {
-      CORSIKA_LOG_WARN(
+      CORSIKA_LOG_DEBUG(
           "shower axis too short, cannot extrapolate (l / max_length_ = {} )",
           l / max_length_);
       if (throw_) {