Add top marging for implementation address container

apps/block_scout_web/assets/css/components/_card.scss

@@ -258,6 +258,10 @@ $card-tab-icon-color-active: #fff !default;
   } 
 }
 
+.implementation-container {
+  margin-top: 10px;
+}
+
 .implementation-title {
   float: left;
   margin-right: 5px;

apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex

@@ -2,7 +2,7 @@
   <button connect-metamask class="button btn-line">Connect to Metamask</button>
 <% end %>
 <%= if @contract_type == "proxy" do %>
-<div>
+<div class="implementation-container">
     <h2 class="implementation-title">Implementation address: </h2><h3  class="implementation-value"><%= link(
                   @implementation_address,
                   to: address_path(@conn, :show, @implementation_address)