* (ui): fix strings

client/src/__locales/en.json

@@ -132,7 +132,7 @@
     "encryption_settings": "Encryption settings",
     "dhcp_settings": "DHCP settings",
     "upstream_dns": "Upstream DNS servers",
-    "upstream_dns_hint": "If you keep this field empty, AdGuard Home will use <a href='https://www.quad9.net/' target='_blank'>Quad9</a> as an upstream.",
+    "upstream_dns_help": "Enter servers addresses one per line. <0>Learn more</0> about configuring upstream DNS servers.",
     "upstream_dns_configured_in_file": "Configured in {{path}}",
     "test_upstream_btn": "Test upstreams",
     "upstreams": "Upstreams",
@@ -579,6 +579,5 @@
     "click_to_view_queries": "Click to view queries",
     "port_53_faq_link": "Port 53 is often occupied by \"DNSStubListener\" or \"systemd-resolved\" services. Please read <0>this instruction</0> on how to resolve this.",
     "adg_will_drop_dns_queries": "AdGuard Home will be dropping all DNS queries from this client.",
-    "please_read_wiki": "Please read the wiki",
     "experimental": "Experimental"
 }

client/src/components/Settings/Dns/Upstream/Form.js

@@ -5,7 +5,6 @@ import { Field, reduxForm } from 'redux-form';
 import { Trans, useTranslation } from 'react-i18next';
 import classnames from 'classnames';
 
-import i18next from 'i18next';
 import Examples from './Examples';
 import { renderRadioField, renderTextareaField } from '../../../../helpers/form';
 import { DNS_REQUEST_OPTIONS, FORM_NAME, UPSTREAM_CONFIGURATION_WIKI_LINK } from '../../../../helpers/constants';
@@ -13,11 +12,9 @@ import { testUpstream } from '../../../../actions';
 import { removeEmptyLines } from '../../../../helpers/helpers';
 
 const Title = () => <label className="form__label" htmlFor="upstream_dns">
-    {i18next.t('upstream_dns')}
-    <div>
-        <a href={UPSTREAM_CONFIGURATION_WIKI_LINK} target="_blank"
-           rel="noopener noreferrer">{i18next.t('please_read_wiki')}</a>
-    </div>
+    <Trans components={[<a href={UPSTREAM_CONFIGURATION_WIKI_LINK} key="0">link</a>]}>
+        upstream_dns_help
+    </Trans>
 </label>;
 
 const getInputFields = (upstream_dns_file) => [

client/src/components/Settings/Dns/Upstream/index.js

@@ -36,7 +36,6 @@ const Upstream = () => {
 
     return <Card
         title={t('upstream_dns')}
-        subtitle={t('upstream_dns_hint')}
         bodyType="card-body box-body--settings"
     >
         <div className="row">