Update fruit-salad.md with peaches

salads/fruit-salad.md

@@ -9,6 +9,7 @@
 - 1 banana, sliced
 - 1 apple, cored and chopped
 - 1 orange, peeled and sectioned
+- 1 cup peaches, cored and chopped
 - Juice of 1 lime or lemon (to prevent the fruit from browning and to add a bit
   of zing)
 - Fresh mint leaves (optional, for garnish)