fix: external library is only for verified contract

apps/block_scout_web/lib/block_scout_web/templates/address_contract/index.html.eex

@@ -109,18 +109,19 @@
         <% end %>
       </section>
 
-      <%= if @address.smart_contract.external_libraries && @address.smart_contract.external_libraries != [] do %>
-        <section>
-          <div class="d-flex justify-content-between align-items-baseline">
-            <h3><%= gettext "External libraries" %></h3>
-          </div>
-          <div class="tile tile-muted mb-4">
-            <pre class="pre-wrap pre-scrollable"><code class="nohighlight"><%= format_external_libraries(@address.smart_contract.external_libraries) %></code>
-            </pre>
-          </div>
-        </section>
+      <%= if BlockScoutWeb.AddressView.smart_contract_verified?(@address) do %>
+        <%= if @address.smart_contract.external_libraries && @address.smart_contract.external_libraries != [] do %>
+          <section>
+            <div class="d-flex justify-content-between align-items-baseline">
+              <h3><%= gettext "External libraries" %></h3>
+            </div>
+            <div class="tile tile-muted mb-4">
+              <pre class="pre-wrap pre-scrollable"><code class="nohighlight"><%= format_external_libraries(@address.smart_contract.external_libraries) %></code>
+              </pre>
+            </div>
+          </section>
+        <% end %>
       <% end %>
-
     </div>
   </div>
 </section>