gaufre: update font subset with new characters

command used (assuming Marianne-Regular.woff2 is in website/public/fonts
dir, taken from the dsfr):

glyphhanger \
  --subset="./Marianne-Regular.woff2" \
  --formats=woff2 \
--whitelist="DémarchessimplifiéesFranceTransfertGristNotepaddel'ÉtatRDVServicePublicResanaTchapWebConférencedel'ÉtatWebinairedel'ÉtatFermer✕
"

we had feedback where text in the popup was rendered with completely
random characters… adding the unicode range should help?

website/public/fonts/readme.md

@@ -10,4 +10,9 @@ glyphhanger \
   --whitelist="DeskLaSuiteNumériqueMessagerieTchapResanaFranceTransfertContactsGristLePadWebConférencedel'ÉtatWebinaire  "
 ```
 
+## ⚠
+
+Make sure to also update the `unicode-range` on the `@font-face` CSS rule. You can get it on the
+glyphhanger command output.
+
 Assuming you have the Marianne-Regular.woff2 file (you can take it from the DSFR).