release announcement: perl is the language, perl 5 is the version

Update the release announcement template to refer to the language as
Perl, and use the full version rather than omitting the 5.

Also update the metacpan link to match its new URLs.

Porting/release_announcement_template.txt

@@ -2,8 +2,8 @@
 
     -- [ATTRIBUTION]
 
-We are [SYNONYM FOR 'pleased'] to announce version [VERSION.SUBVERSION],
-the [N-TH] development release of version [VERSION] of Perl 5.
+We are [SYNONYM FOR 'pleased'] to announce version 5.[VERSION.SUBVERSION],
+the [N-TH] development release of version 5.[VERSION] of Perl.
 
 You will soon be able to download Perl 5.[VERSION.SUBVERSION] from your
 favorite CPAN mirror or find it at:
@@ -18,7 +18,7 @@ SHA256 digests for this release are:
 You can find a full list of changes in the file "perldelta.pod" located in
 the "pod" directory inside the release and on the web at
 
-https://metacpan.org/pod/release/[AUTHOR]/perl-5.[VERSION.SUBVERSION]/pod/perldelta.pod
+https://metacpan.org/release/[AUTHOR]/perl-5.[VERSION.SUBVERSION]/view/pod/perldelta.pod
 
 [ACKNOWLEDGEMENTS SECTION FROM PERLDELTA]