Add Phoeenix logo to supporting companies (#115)

Author: crespire

app/views/layouts/_supporting_companies.html.erb

@@ -7,12 +7,15 @@
     <%= link_to 'https://shopify.com', class: 'group grayscale hover:grayscale-0 transition-all duration-300', target: '_blank', rel: 'noopener' do %>
       <%= image_tag "sponsors/shopify.png", class: "h-12 md:h-16 w-auto opacity-60 group-hover:opacity-100 transition-opacity", alt: "Shopify" %>
     <% end %>
+    <%= link_to 'https://phoenix.ca/', class: 'group grayscale hover:grayscale-0 transition-all duration-300', target: '_blank', rel: 'noopener' do %>
+      <%= image_tag "sponsors/phoenix.png", class: "h-16 md:h-20 w-auto opacity-60 group-hover:opacity-100 transition-opacity", alt: "Phoenix" %>
+    <% end %>
     <%= link_to 'https://switchgrowth.com', class: 'group grayscale hover:grayscale-0 transition-all duration-300', target: '_blank', rel: 'noopener' do %>
       <%= image_tag "sponsors/switch.png", class: "h-16 md:h-20 w-auto opacity-60 group-hover:opacity-100 transition-opacity", alt: "Switch" %>
     <% end %>
   </div>
   <p class="mt-6 text-sm text-gray-600">
-    Interested in supporting Toronto Ruby? 
+    Interested in supporting Toronto Ruby?
     <%= link_to "Get in touch", "mailto:info@toronto-ruby.com", class: "text-ruby-500 hover:text-ruby-600 font-medium" %>
   </p>
 </div>