espat,wifinina,rtl8720dn: change ssid/pass from const to var

examples/wifinina/webclient/main.go

@@ -3,7 +3,6 @@
 // Arduino example:
 //
 // https://github.com/arduino-libraries/WiFiNINA/blob/master/examples/WiFiWebClientRepeating/
-//
 package main
 
 import (
@@ -15,9 +14,11 @@ import (
 	"tinygo.org/x/drivers/wifinina"
 )
 
-// access point info
-const ssid = ""
-const pass = ""
+var (
+	// access point info
+	ssid string
+	pass string
+)
 
 // IP address of the server aka "hub". Replace with your own info.
 const server = "tinygo.org"