remove unknown word ``unknowen''. Close PR  docs/1239
remove unknown word ``unknowen''. Close PR  docs/1239

Submitted by: Cove Schneider <cove@brazil.nbn.com>

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase