README: Small text fixes.

README

 
  # This fails. It tries to use name that is not previously configured.
 
-   videohubctrl -h sdi --vo-name 1 "Test output" \\
+   videohubctrl -h sdi --vo-name 1 "Test output" \
                        --vo-name "Test output" "Other name"
 
 
   | Protocol                   | 2.4                        |
   | Video inputs               | 16                         |
   | Video outputs              | 16                         |
+  | Video monitoring outputs   | 4                          |
   -----------------------------------------------------------
 
 Video inputs