roannais-icitoyen: add new asset slot emails:logo (#41540)

static/roannais-icitoyen/config.json

@@ -2,12 +2,14 @@
   "label": "Roannais Icitoyen",
   "variables": {
     "pwa_display": "standalone",
-    "theme_color": "#ff3300"
+    "theme_color": "#ff3300",
+    "email_header_asset": "emails:logo"
   },
   "settings": {
     "combo": {
       "COMBO_ASSET_SLOTS.update": {
         "header:logo": { "label": "Têtière : logo" },
+        "emails:logo": {"label": "Emails : logo"},
         "logo:commelle-vernay": { "label": "logo : Commelle Vernay" },
         "logo:mably": { "label": "logo : Mably" },
         "logo:loffice-de-tourisme": { "label": "logo : Office de tourisme" },