Small grammar fix: replaced "it's" with "its"

Author: Dmitri Tikhonov

book/04-git-server/sections/git-daemon.asc

@@ -1,7 +1,7 @@
 === Git Daemon
 
 (((serving repositories, git protocol)))
-Next we'll set up a daemon serving repositories over the ``Git'' protocol. This is common choice for fast, unauthenticated access to your Git data. Remember that since it's not an authenticated service, anything you serve over this protocol is public within it's network.
+Next we'll set up a daemon serving repositories over the ``Git'' protocol. This is common choice for fast, unauthenticated access to your Git data. Remember that since it's not an authenticated service, anything you serve over this protocol is public within its network.
 
 If you're running this on a server outside your firewall, it should only be used for projects that are publicly visible to the world.
 If the server you're running it on is inside your firewall, you might use it for projects that a large number of people or computers (continuous integration or build servers) have read-only access to, when you don't want to have to add an SSH key for each.