[editor] Change names of virtual keyboards for math

projects/editor/src/assets/i18n/de.json

@@ -107,9 +107,9 @@
     "inputAssistance": "Eingabehilfe",
     "none": "keine",
     "french": "Französische Sonderzeichen",
-    "numbers": "Zahlen",
-    "numbersAndOperators": "Zahlen & Operatoren & '='",
-    "numbersAndBasicOperators": "Zahlen & Basis-Operatoren",
+    "numbers": "Ziffern",
+    "numbersAndOperators": "Ziffern & Operatoren & '='",
+    "numbersAndBasicOperators": "Ziffern & Basis-Operatoren",
     "squareDashDot": "Quadrat Strich Punkt",
     "placeValue": "Stellenwert",
     "comparisonOperators": "Vergleichsoperatoren",