[2.20.0] "Pétrichor" ne sonne plus comme "chien"

• 2.20.0 — A dedicated audit poem (built from real entries in Alucard's own
  dictionnaire-perso.json) surfaced one more small gap: "ch" pronounced [k] instead of the
  usual [ʃ] in a handful of Greek-origin/technical words — "pétrichor", "chœur", "chrome",
  "chronique", "choral", "écho", "orchestre", "psychologie", "archéologie", "chaos", "chlore",
  "chrétien", "technique", "technologie", "orchidée"... Fixed in both allitérations (for words
  actually starting with "ch") and Trame phonique (for "ch" anywhere in the word, which is how
  this was first noticed — "pétrichor" was landing in the same [ʃ] bucket as "chien"/"chaleur"
  instead of its own [k] one). Small root-based exception list, not exhaustive, same pattern as
  the other exceptions already in this section (CaReFuL, "-er" infinitives, "ill"...).