Typo fix

Author: microbit-matt-hillsdon

src/device/webusb.ts

@@ -80,7 +80,7 @@ export class MicrobitWebUSBConnection
         if (!this.flashing) {
           this.log("Reconnecting visible tab");
           this.connect({
-            // If any other connection status change occurs then visibilitReconnect is set to false, so
+            // If any other connection status change occurs then visibilityReconnect is set to false, so
             // it's likely the same program at this point.
             serial: SerialOption.NoReset,
           });