fr: Default to Paris timezone

For projects in Haiti we have a (private) fr_HT personality.

Checking our metrics, the majority of fr activations are in metropolitan
France (the hexagonal bit of France that is just across the channel from
the UK, rather than overseas regions).

config/personality/fr.ini

@@ -1,10 +1,8 @@
 # fr personality settings
 
 [image]
-# FIXME: Language codes (locales) and timezone are country specific, so
-# just choose Haiti for now since that's where we'll release first.
 language = fr_FR.utf8
-timezone = America/Port-au-Prince
+timezone = Europe/Paris
 
 [flatpak]
 locales = fr