misleading error message on missing query file

[VladimirAlexiev]

If the file model/objekt.fx doesn't exist, SA returns this error:

sparql-anything -q model/objekt.fx -v location=csv/objekt.csv -o ttl/objekt1.ttl
Exception in thread "main" io.github.basilapi.basil.sparql.UnknownQueryTypeException: Unknown query type:model/objekt.fx
        at io.github.basilapi.basil.sparql.QueryType.guessQueryType(QueryType.java:148)
        at io.github.basilapi.basil.sparql.QueryType.isUpdate(QueryType.java:152)
        at io.github.basilapi.basil.sparql.SpecificationFactory.create(SpecificationFactory.java:24)
        at io.github.sparqlanything.cli.SPARQLAnything.executeQueryWithValues(SPARQLAnything.java:540)
        at io.github.sparqlanything.cli.SPARQLAnything.main(SPARQLAnything.java:729)

Would be better to print "Missing query file: "