Update modules-extra.pod6

Rename p6doc to rakudoc

Author: finanalyst

doc/Language/modules-extra.pod6

@@ -18,8 +18,7 @@ of a module distribution.
 =item L<App::Mi6|https://modules.raku.org/dist/App::Mi6>     Minimal authoring tool for Raku
 =item L<META6|https://modules.raku.org/dist/META6>        Do things with Raku C<META> files
 =item L<Module::Skeleton|https://bitbucket.org/rightfold/module-skeleton>        Generate a skeleton module
-=item L<p6doc|https://modules.raku.org/dist/p6doc>        Generate documentation end-products
-
+=item L<rakudoc|https://modules.raku.org/dist/rakudoc>        Generate documentation end-products
 
 =head1 Tests