qapi/ui: correct typos

Correct typos automatically found with the `typos` tool
<https://crates.io/crates/typos>

Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

qapi/ui.json

@@ -63,7 +63,7 @@
 ##
 # @SetPasswordOptionsVnc:
 #
-# Options for set_password specific to the VNC procotol.
+# Options for set_password specific to the VNC protocol.
 #
 # @display: The id of the display where the password should be
 #     changed.  Defaults to the first.
@@ -125,7 +125,7 @@
 ##
 # @ExpirePasswordOptionsVnc:
 #
-# Options for expire_password specific to the VNC procotol.
+# Options for expire_password specific to the VNC protocol.
 #
 # @display: The id of the display where the expiration should be
 #     changed.  Defaults to the first.