Fix printing not supported option in restricted mode

[lwronski]

When I run:

./scala --scala -3 --markdown .

it throw the following error:

Exception in thread "main" java.lang.IndexOutOfBoundsException: 2
        at scala.collection.LinearSeqOps.apply(LinearSeq.scala:131)
        at scala.collection.LinearSeqOps.apply$(LinearSeq.scala:128)
        at scala.collection.immutable.List.apply(List.scala:79)
        at scala.cli.commands.RestrictedCommandsParser$$anon$1.step(RestrictedCommandsParser.scala:39)
        at caseapp.core.parser.EitherParser.step(EitherParser.scala:24)
        at caseapp.core.parser.RecursiveConsParser.step(RecursiveConsParser.scala:26)
        at caseapp.core.parser.ConsParser.step(ConsParser.scala:36)
        at caseapp.core.parser.ConsParser.step(ConsParser.scala:36)
        at caseapp.core.parser.MappedParser.step(MappedParser.scala:25)
        at caseapp.core.parser.MappedParser.step(MappedParser.scala:25)
        at caseapp.core.parser.RecursiveConsParser.step(RecursiveConsParser.scala:26)
        at caseapp.core.parser.MappedParser.step(MappedParser.scala:25)
        at caseapp.core.parser.MappedParser.step(MappedParser.scala:25)
        at caseapp.core.parser.ParserWithNameFormatter.step(ParserWithNameFormatter.scala:21)
        at caseapp.core.parser.ParserMethods.step(ParserMethods.scala:25)
        at caseapp.core.parser.ParserMethods.step$(ParserMethods.scala:12)
        at caseapp.core.parser.Parser.step(Parser.scala:15)
        at caseapp.core.parser.ParserMethods.helper$1(ParserMethods.scala:214)
        at caseapp.core.parser.ParserMethods.scan(ParserMethods.scala:276)
        at caseapp.core.parser.ParserMethods.scan$(ParserMethods.scala:12)
        at caseapp.core.parser.Parser.scan(Parser.scala:15)
        at caseapp.core.parser.ParserMethods.detailedParse(ParserMethods.scala:128)

I fixed extracting option passed by user in RestrictedCommandsParser.