Add Philippine Peso to currency alternatives in plasma im module

There was room for one more, so let's completely fill the palette.

src/platforminputcontextplugin/data/plasmakeydata.h

@@ -163,7 +163,7 @@ const QMap<QString,QList<QString>> KeyMappings = {
     //
     // Currency
     //
-    {"$", {"¢", "€", "£", "¥", "₹", "₽", "₺", "₩", "₿"}},
+    {"$", {"¢", "€", "£", "¥", "₹", "₽", "₺", "₩", "₱", "₿"}},
 };
 
 }