chore: add german translations (#34167)

* chore: add german translations

* Apply suggestions from code review

Co-authored-by: Raffael Meyer <14891507+barredterra@users.noreply.github.com>

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Co-authored-by: Raffael Meyer <14891507+barredterra@users.noreply.github.com>
diff --git a/erpnext/translations/de.csv b/erpnext/translations/de.csv
index 5a0a863..bec3ce2 100644
--- a/erpnext/translations/de.csv
+++ b/erpnext/translations/de.csv
@@ -9916,3 +9916,5 @@
 Delivered at Place,Geliefert benannter Ort,
 Delivered at Place Unloaded,Geliefert benannter Ort entladen,
 Delivered Duty Paid,Geliefert verzollt,
+Discount Validity,Frist für den Rabatt,
+Discount Validity Based On,Frist für den Rabatt berechnet sich nach,