[rosalind] update sample output docs
[rosalind] update sample output docs

The documented value now matches that which is produced from the program.
The sample data from the Rosalind Project website is 3 8 10, which is also a
valid solution, and only one valid solution needs to be printed to be
acceptable.

shlomif/perl6-examples,perl6/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples,shlomif/perl6-examples,perl6/perl6-examples,shlomif/perl6-examples,stmuk/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples,shlomif/perl6-examples,perl6/perl6-examples,Quinny/perl6-examples,stmuk/perl6-examples,stmuk/perl6-examples,Quinny/perl6-examples,stmuk/perl6-examples,stmuk/perl6-examples,shlomif/perl6-examples,Quinny/perl6-examples