Changed name from key.gpg to key.pgp

Signed-off-by: Louis Vallat <louis@louis-vallat.xyz>

index.html

@@ -151,7 +151,7 @@ PAGE CODED BY :
             </p>
             <div class="flex-sb" id="additional-links">
                 <a class="button-style" href="mailto:contact@louis-vallat.xyz" target="_blank"><img src="/assets/images/send.svg" alt="Logo envoi"/>Me contacter</a>
-                <a class="button-style" href="/key.gpg"><img src="/assets/images/key.svg" alt="Logo de clef"/>Ma clef GPG</a>
+                <a class="button-style" href="/key.pgp"><img src="/assets/images/key.svg" alt="Logo de clef"/>Ma clef PGP</a>
                 <a class="button-style" href="https://gallery.louis-vallat.xyz" target="_blank"><img src="/assets/images/camera.svg" alt="Logo d'appareil photo"/>Gallerie photo</a>
                 <a class="button-style" href="https://blog.louis-vallat.xyz" target="_blank"><img src="/assets/images/article.svg" alt="Logo d'article"/>Blog</a>
             </div>