luci-proto-openvpn: i18n fix typo in TLS cert profile label

Fix a typo in the cryptography tab where 'TLS cert profile' was
accidentally written as 'TLS cet profile'.

Signed-off-by: David Han <h96643864@gmail.com>

protocols/luci-proto-openvpn/htdocs/luci-static/resources/protocol/openvpn.js

@@ -1272,7 +1272,7 @@ const openvpnOptions = [
 		tab: 'cryptography',
 		type: form.Value,
 		name: 'tls_cert_profile',
-		label: _('TLS cet profile'),
+		label: _('TLS cert profile'),
 		lvalues: [
 			'insecure',
 			'legacy',