Update Semantics.pod
Update Semantics.pod

typo fixes
jeffreykegler/libmarpa,pczarn/kollos,jeffreykegler/kollos,jeffreykegler/kollos,pczarn/kollos,jeffreykegler/kollos,pczarn/kollos,jeffreykegler/libmarpa,pczarn/kollos,jeffreykegler/kollos,jeffreykegler/libmarpa,jeffreykegler/kollos,jeffreykegler/libmarpa,pczarn/kollos,jeffreykegler/libmarpa