docs: fix code in creating-grc20.md (#2246)

Description:
While helping someone on Discord who had an `issue` with the [gcr20
tutorial](https://docs.gno.land/how-to-guides/creating-grc20), I took
the liberty of suggesting modifications to fix the problem for future
users

![SCR-20240530-puwl](https://github.com/gnolang/gno/assets/90353329/b5009774-0d35-4d33-ae05-267e33d6009d)

---------

Co-authored-by: théo dub <theodub@MacThox.local>
Co-authored-by: Morgan <git@howl.moe>

docs/how-to-guides/creating-grc20.md

@@ -142,7 +142,7 @@ func TransferFrom(sender, recipient std.Address, amount uint64) {
 		panic("transfer amount must be greater than zero")
 	}
 
-	if err := mytoken.TransferFrom(caller, from, to, amount); err != nil {
+	if err := mytoken.TransferFrom(caller, sender, recipient, amount); err != nil {
 		panic(err)
 	}
 }
@@ -220,6 +220,7 @@ Calling the `Render` method returns a general render of the GRC20 realm, or
 if given a specific address, the user's `balance` as a formatted string.
 
 You can view the full code on [this Playground link](https://play.gno.land/p/km7Ja6WDQoL).
+If you want to deploy it, do so on the [Portal Loop](../concepts/portal-loop.md).
 
 ## Conclusion
 That's it 🎉