chore(l10n): update Arabic translations

Currently translated at 34.7% (33 of 95 strings)

Translation: Fossify/Calculator
Translate-URL: https://hosted.weblate.org/projects/fossify/calculator/ar/
Via: Weblate

Author: elid

app/src/main/res/values-ar/strings.xml

@@ -32,5 +32,5 @@
     <string name="unit_length_angstrom">أنجستروم</string>
     <string name="unit_mass_milligram">מיליגרם</string>
     <string name="unit_volume_liter">ליטר</string>
-    <string name="unit_mass_ounce">אונקיה</string>
+    <string name="unit_mass_ounce">أونصة</string>
 </resources>