“Perl 5 and 6” → “Perl 5 and Perl 6”

I think that it is technically more correct, and it also does not look so
strange with non-breaking space.

Author: AlexDaniel

doc/Language/faq.pod6

@@ -76,7 +76,7 @@ is the measure of how complete a Perl 6 implementation is.
 
 Yes, see L<glossary|/language/glossary>.
 
-=head2 I'm a Perl 5 programmer. Where is a list of differences between Perl 5 and 6?
+=head2 I'm a Perl 5 programmer. Where is a list of differences between Perl 5 and Perl 6?
 
 See the '5to6-nutshell' pod under L<https://docs.perl6.org/language/5to6-nutshell>
 and related pages.