Update telegram link

apps/block_scout_web/config/config.exs

@@ -93,7 +93,7 @@ config :block_scout_web, BlockScoutWeb.Gettext, locales: ~w(en), default_locale:
 
 config :block_scout_web, BlockScoutWeb.SocialMedia,
   twitter: "PoaNetwork",
-  telegram: "oraclesnetwork",
+  telegram: "poa_network",
   facebook: "PoaNetwork",
   instagram: "PoaNetwork"
 

apps/block_scout_web/lib/block_scout_web/templates/layout/_footer.html.eex

@@ -17,7 +17,7 @@
           <a href="https://www.twitter.com/PoaNetwork/" rel="noreferrer" target="_blank" class="icon-link" data-toggle="tooltip" data-placement="top" title="<%= gettext("Twitter") %>">
             <i class="fab fa-twitter"></i>
           </a>
-          <a href="http://t.me/oraclesnetwork" rel="noreferrer" target="_blank" class="icon-link" data-toggle="tooltip" data-placement="top" title="<%= gettext("Telegram") %>">
+          <a href="https://t.me/poa_network" rel="noreferrer" target="_blank" class="icon-link" data-toggle="tooltip" data-placement="top" title="<%= gettext("Telegram") %>">
             <i class="fab fa-telegram-plane"></i>
           </a>
         </div>