Remove ambiguity

Otherwise 'it' could refer to 'ping' or 'Tails'.

wiki/src/support/faq.mdwn

@@ -499,7 +499,7 @@ behind a hidden service on Tails. See [[!tails_ticket 7879]].
 Can I use <span class="command">ping</span> in Tails?
 -----------------------------------------------------
 
-It is impossible to use <span class="command">ping</span> in Tails, because it uses ICMP and Tor
+It is impossible to use <span class="command">ping</span> in Tails, because <span class="command">ping</span> uses ICMP and Tor
 can only work with TCP. Therefore it can't be redirected through the Tor
 network.