fix(tokens/sell): correct fee percentage label to show '%'

Signed-off-by: Brandon McAnsh <git@bmcreations.dev>

Author: bmc08gt

apps/flipcash/core/src/main/res/values/strings.xml

@@ -413,7 +413,7 @@
     <string name="label_ofToken">of %1s</string>
 
     <string name="label_sellAmount">Sell Amount</string>
-    <string name="label_percentFee">%1$d Fee</string>
+    <string name="label_percentFee">%1$d%% Fee</string>
 
     <string name="label_social_website">Website</string>
     <string name="label_social_x">\@%1$s</string>