Porting/epigraphs.pod - Add missing announcement links

(cherry picked from commit 68abab0)

Porting/epigraphs.pod

@@ -44,13 +44,17 @@ the other, the people who did a great deal and made no noise at all.
 
 =head2 v5.35.6 - Hannu Rajaniemi, The Quantum Thief
 
+L<Announced on 2021-11-22 by Richard Leach|https://www.nntp.perl.org/group/perl.perl5.porters/2021/11/msg261958.html>
+
 "I have to say you were very clever. The chocolate tasted subtly wrong.
 He is in the dress, isn't he? His mind. You used the fabber to put it
 there. They had just finished the original: you melted it and made a
 copy."
 
 =head2 v5.35.5 - Frank Herbert, Heretics of Dune
 
+L<Announced on 2021-10-21 by Leon Timmermans|https://www.nntp.perl.org/group/perl.perl5.porters/2021/10/msg261779.html>
+
 Again, she sent the light beam along the mounded melange. Her attention was
 drawn to a strip of the wall above the spice. More words! Still in Chakobsa,
 written with a cutter in a fine flowing script, there was another message: