Correct grammar in sign in title

app/src/main/res/values/strings.xml

@@ -2,7 +2,7 @@
     <string name="app_name" translatable="false">Rocket.Chat</string>
 
     <!-- Titles -->
-    <string name="title_sign_in_your_server">Sign in your server</string>
+    <string name="title_sign_in_your_server">Sign in to your server</string>
     <string name="title_log_in">Log in</string>
     <string name="title_register_username">Register username</string>
     <string name="title_reset_password">Reset password</string>