feat(dashboard): Added average distance

src/locales/de.json

@@ -491,5 +491,6 @@
   "you-must-create-at-least-one-card-or-cancel": "Du musst mindestens eine Blankokarte erstellen (oder abbrechen).",
   "zip-postal-code": "Postleitzahl",
   "total-donors": "gesamte Sponsor:innen",
-  "total-donation-count": "Gesamte Sponsorings"
+  "total-donation-count": "Gesamte Sponsorings",
+  "average-distance": "Durchschnittliche Strecke/Läufer:in"
 }

src/locales/en.json

@@ -491,5 +491,6 @@
   "you-must-create-at-least-one-card-or-cancel": "You must create at least one card (or cancel).",
   "zip-postal-code": "ZIP/ postal code",
   "total-donors": "total donors",
-  "total-donation-count": "total donations (count)"
+  "total-donation-count": "total donations (count)",
+  "average-distance": "average distance"
 }