Add Length_Angstrom as a new unit constant

Adds Angstrom as a length unit to the list of unit constants in UnitConverterDataConstants.h file.

src/CalcViewModel/DataLoaders/UnitConverterDataConstants.h

@@ -165,8 +165,9 @@ namespace CalculatorApp
             Data_Zetabytes = UnitStart + 164,
             Area_Pyeong = UnitStart + 165,
             Energy_Kilowatthour = UnitStart + 166,
-			Data_Nibble = UnitStart + 167,
-            UnitEnd = Data_Nibble
+            Data_Nibble = UnitStart + 167,
+            Length_Angstrom = UnitStart + 168,
+            UnitEnd = Length_Angstrom
         };
     }
 }