hi, there are a encoding issue

[NoString]

I'm a chinese user, and when I run the remote_command_execution_vulnerability.py , I will show a error
Router IP address: 192.168.31.1
stok: 64541fbba476852422ba63742d8f25e9
Traceback (most recent call last):
File "C:\Users\zhs\Documents\OpenWRTInvasion-0.0.3\remote_command_execution_vulnerability.py", line 42, in <module> UnicodeDecodeError: 'gbk' codec can't decode byte 0xbf in position 2: illegal multibyte sequence
I tried to fix it, and success. this is the new code,
for the 41 line:
with open("speedtest_urls_template.xml","rt", encoding='utf-8') as f:
for the 45 line:
with open("build/speedtest_urls.xml",'wt', encoding='utf-8') as f:

[acecilia]

Thanks! Feel free to open a PR