Use "shaka" for Indian era code

Author: sffc

common/supplemental/supplementalData.xml

@@ -4865,7 +4865,7 @@ XXX Code for transations where no currency is involved
         </calendar>
         <calendar type="indian">
           <eras>
-              <era type="0" start="79-01-01" code="saka"/>
+              <era type="0" start="79-01-01" code="shaka" aliases="saka"/>
           </eras>
         </calendar>
         <calendar type="roc">