Move menu info inside front-matter

content/en/about.md

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 title: "Who am I?"
 date: !!timestamp '2017-07-31T00:50:07+02:00'
 update: !!timestamp '2021-07-24T00:00:00+01:00'
+menu:
+  main:
+    name: "About"
+    weight: 30
 ---
 
 Hello! `nemunaire` here, aka Pierre-Olivier; I am an engineer (and passionate about [how things work](https://en.wikipedia.org/wiki/Wikipedia)), a teacher (and a pioneer of [gamification](https://en.wikipedia.org/wiki/Gamification) in my classes), a cook (and an advocate of [limiting the ecological footprint in our eating habits](https://en.wikipedia.org/wiki/Vegetarianism)) and I also fight against the hold of [GAFAM](https://en.wikipedia.org/wiki/GAFAM) on our time. Besides, I generally adhere to [stoicism](https://en.wikipedia.org/wiki/Stoicism). I love typography, challenges, chocolate (or vanilla?? the choice is too hard) and so many other things!

content/en/talks.md

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 ---
 title: "Talks"
 date: !!timestamp '2017-07-31T00:07:37+02:00'
+menu:
+  main:
+    weight: 40
 ---
 
 Here are slides I used as support to my presentations: