fix typo

Former-commit-id: 7b5d5530279789a3118190feb57776948b305662

_examples/sessions/database/badger/main.go

@@ -44,7 +44,7 @@ func main() {
 		//set session values
 		s.Set("name", "iris")
 
-		//test if setted here
+		//test if set here
 		ctx.Writef("All ok session value of the 'name' is: %s", s.GetString("name"))
 	})
 
@@ -54,7 +54,7 @@ func main() {
 		// set session values
 		s.Set(key, value)
 
-		// test if setted here
+		// test if set here
 		ctx.Writef("All ok session value of the '%s' is: %s", key, s.GetString(key))
 	})