[Twisted-Python] trivial typo in core doc

[David Kao]

"""
For this reason, you must explicitly specific what remote classes will
be accepted, and how their local representatives are to be created.
"""

I think "explicitly specify" is what is intended.

I am new to twisted. Not sure how easy it would have been for me to
open a ticket or fix it myself, but for now I am simply recording this
typo.


David Kao