Update link to Perl 6 Pod documentation in Modules
Update link to Perl 6 Pod documentation in Modules

The link was pointing to https://design.perl6.org/S26.html and probably
is better to use the Perl 6 Pod documentation from docs.perl6.org

stmuk/doc,perl6/doc,perl6/doc,MasterDuke17/doc,MasterDuke17/doc,stmuk/doc,stmuk/doc,MasterDuke17/doc,perl6/doc,tbrowder/doc,MasterDuke17/doc,tbrowder/doc,perl6/doc,tbrowder/doc,perl6/doc,stmuk/doc,stmuk/doc,tbrowder/doc