Spelling: Fix spelling of "similarly"

Detected by Debian's Lintian tool.

Signed-off-by: Simon McVittie <smcv@collabora.com>

docs/reference/gio/gdbus-codegen.xml

@@ -869,7 +869,7 @@ my_app_frobber_proxy_new_sync   (GDBusConnection     *connection,
       subclass. For example, to handle
       <function>HelloWorld()</function> method invocations, set the
       vfunc for <function>handle_hello_hello_world()</function> in the
-      <type>MyAppFrobberIface</type> structure. Similary, to handle
+      <type>MyAppFrobberIface</type> structure. Similarly, to handle
       the <parameter>net.Corp.MyApp.Frobber:Verbose</parameter>
       property override the <parameter>:verbose</parameter> #GObject
       property from the subclass. To emit a signal, use

gio/gdbusconnection.c

@@ -3088,7 +3088,7 @@ static volatile guint _global_filter_id = 1;
  * dispatched anywhere else - not even the standard dispatch machinery
  * (that API such as g_dbus_connection_signal_subscribe() and
  * g_dbus_connection_send_message_with_reply() relies on) will see the
- * message. Similary, if a filter consumes an outgoing message, the
+ * message. Similarly, if a filter consumes an outgoing message, the
  * message will not be sent to the other peer.
  *
  * If @user_data_free_func is non-%NULL, it will be called (in the

gio/gunionvolumemonitor.c

@@ -621,7 +621,7 @@ _g_mount_get_for_mount_path (const gchar  *mount_path,
  * also listen for the "removed" signal on the returned object
  * and give up its reference when handling that signal
  * 
- * Similary, if implementing g_volume_monitor_adopt_orphan_mount(),
+ * Similarly, if implementing g_volume_monitor_adopt_orphan_mount(),
  * the implementor must take a reference to @mount and return it in
  * its g_volume_get_mount() implemented. Also, the implementor must
  * listen for the "unmounted" signal on @mount and give up its