docs+lntest: fix typos

docs/grpc/python.md

@@ -70,7 +70,7 @@ import grpc
 import os
 
 # Due to updated ECDSA generated tls.cert we need to let gprc know that
-# we need to use that cipher suite otherwise there will be a handhsake
+# we need to use that cipher suite otherwise there will be a handshake
 # error when we communicate with the lnd rpc server.
 os.environ["GRPC_SSL_CIPHER_SUITES"] = 'HIGH+ECDSA'