Add Finnish translation

src-ui/src/app/services/settings.service.ts

@@ -208,6 +208,12 @@ export class SettingsService {
         englishName: 'Spanish',
         dateInputFormat: 'dd/mm/yyyy',
       },
+      {
+        code: 'fi-fi',
+        name: $localize`Finnish`,
+        englishName: 'Finnish',
+        dateInputFormat: 'dd.mm.yyyy',
+      },
       {
         code: 'fr-fr',
         name: $localize`French`,