Update _footer.html.eex

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

@@ -10,10 +10,10 @@
     </div>
 
     <% other_explorers = other_explorers() %>
-    <% col_size = if Enum.empty?(other_explorers), do: 3, else: 4 %>
+    <% col_size = if Enum.empty?(other_explorers), do: 3, else: 2 %>
 
     <div class="row">
-      <div class="col-md-<%= col_size %>">
+      <div class="col-md-3">
         <p class="footer-info-text"><%= gettext("Blockscout is a tool for inspecting and analyzing EVM based blockchains. Blockchain explorer for Ethereum Networks.") %></p>
         <div class="footer-social-icons">
           <a href="https://github.com/poanetwork/blockscout" rel="noreferrer" target="_blank" class="footer-social-icon" title='<%= gettext("Github") %>'>
@@ -84,4 +84,4 @@
       </div>
     <% end %>
   </div>
-</footer>
+</footer>