Fix unable to sniff and deface.

[Akshay-Arjun]

1. Fixes Unable to sniff post data. Undefined method `unescape' for URI:Module #331 . Now xerosploit can capture post data successfully.

As the URI.unescape is deprecated for Ruby 2.7.x so, we need to use URI.decode_www_form_component for URL decoding.
https://ruby-doc.org/stdlib-2.5.3/libdoc/uri/rdoc/URI/Escape.html#method-i-unescape

2. Fixes Error while defacing #333
   In Xerosploit.py line 774 and 778 there is /home/home/xero-html.html , Here not everyone have their username as home so it fails to create and open file. I have made changes to it so that it will now create a xerodeface directory inside opt/xerosploit/ and store the xero-html.html inside it.