Update DE translations (#40)

translation completed for the source file '/i18n/en.json'
on the 'de' language.

Co-authored-by: transifex-integration[bot] <43880903+transifex-integration[bot]@users.noreply.github.com>

i18n/de.json

@@ -43,6 +43,7 @@
     "School:": "Schule:",
     "Tourism:": "Tourismus:",
     "On demand:": "Nach Bedarf:",
+    "Bicycle:": "Fahrrad:",    
     "Fares": "Tarife",
     "Edit Fares": "Bearbeite Tarife",
     "Schedules": "Fahrpläne",