docs: add credits for icons

content/en/about.md

@@ -2,6 +2,16 @@
 ## Introduction
 This is the personal website of Lucien “Phundrak” Cartier-Tilet.
 
-This website is made with Vuepress and is entirely free and
-open-source. You can find its source code on my Gitea instance
-[here](https://labs.phundrak.com/phundrak/phundrak.com).
+It is written with [Vuepress](https://v2.vuepress.vuejs.org/) and is
+completely open-source. You can find the source code on my [personal
+Gitea instance](https://labs.phundrak.com/phundrak/phundrak.com).
+Icons used on this website come from different sources:
+- [IcoMoon](https://icomoon.io/) which I use to consolidate all the
+  icons used in one font, including some icons from their default pack
+- [FontAwesome](https://fontawesome.com/) from which most icons come
+  from --- their Vue package is, in my opinion, really not usable
+- The [Language Creation Society](https://conlang.org/) whose logo I
+  modified in order to create the icon used here when referring to my
+  constructed languages
+- [Emacs](https://www.gnu.org/software/emacs/) whose logo I partially
+  remade as an SVG file in order to create an icon.