vswitch.xml: Fix typo in documentation.
Acked-by: Yi-Hung Wei
</column>
<column name="other_config" key="dp-desc">
- Human readable description of datapath. It it a maximum 256
+ Human readable description of datapath. It is a maximum 256
byte-long free-form string to describe the datapath for
debugging purposes, e.g. <code>switch3 in room 3120</code>.
</column>
