Fixes 'enable' call issue when device prompt is a substring of literal 'password' string

[ktbyers]

Fixes: #3704

[ktbyers]

nc = ConnectHandler(**device)
print(nc.find_prompt())
nc.enable()
print(nc.find_prompt())

Testing with fix present:
$ python test1.py 
AS>
AS#

Testing without fix (current code)
$ python test1.py 
AS>
Traceback (most recent call last):
  File "/home/kbyers/EP/test1.py", line 12, in <module>
    nc.enable()
  File "/home/kbyers/VENV/py3_venv/lib/python3.11/site-packages/netmiko/cisco_base_connection.py", line 27, in enable
    return super().enable(
           ^^^^^^^^^^^^^^^
  File "/home/kbyers/VENV/py3_venv/lib/python3.11/site-packages/netmiko/base_connection.py", line 2062, in enable
    raise ValueError(msg)
ValueError: Failed to enter enable mode. Please ensure you pass the 'secret' argument to ConnectHandler.