chore(docs): update footer links and logo

Signed-off-by: Polina Sizintseva <polina.sizintseva@flant.com>

Author: odiora

_config_en.yml

@@ -1,5 +1,5 @@
 company_name: Flant
-company_url: https://flant.com
+company_url: https://flant.ru
 url: https://werf.io
 site_lang: en
 issuelink: "https://github.com/werf/website/issues/new"

_includes/_common/footer.html

@@ -20,7 +20,7 @@
                         <div class="footer__block-flant-text">Проект werf был изначально создан в&nbsp;компании «Флант»</div>
                     </a>
                 {%- else %}
-                    <a href="https://flant.com/" target="_blank">
+                    <a href="https://flant.ru/" target="_blank">
                         <img src="/assets/images/flant-logo-en.svg" alt="flant logo">
                         <div class="footer__block-flant-text">werf was originally created by Flant</div>
                     </a>