Use Pixelfed portfolio link.

src/content/authors/default.mdx

@@ -8,7 +8,7 @@ mastodon: https://indieweb.social/@gmarty
 linkedin: https://www.linkedin.com/in/gmarty
 gitlab: https://gitlab.com/gmarty
 github: https://github.com/gmarty
-pixelfed: https://pixelfed.social/gmarty
+pixelfed: https://portfolio.pixelfed.social/gmarty
 ---
 
 Guillaume (pronounced _/ghee-yom/_) has been working in the tech industry for two decades. He was previously as a software engineer at **Mozilla** on the Firefox OS, and an engineering manager and coach at **Twitter**.