fix(windows): encode SSID on xml generation

[is-equal]

Description

Fix failure to connect when the wifi has special characters like &.

Motivation and Context

My wifi has an SSID with special characters so when I try to connect I get an error.
Investigating more about the problem and trying to run netsh wlan add profile .\nodeWifiConnect.xml to add the profile generated by node-wifi I get:

An attempt was made to load a program with an incorrect format.

Reading the file and comparing it with the profile generated by Windows 10, I found the difference and applied the fix encoding the special characters on SSID.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Refactorization (non-functional change which improve code readibility)