chore: update sponsors

Author: kamilmysliwiec

img/blackjackonline-logo.png

@@ -1265,6 +1265,12 @@ <h5>Sponsors / Partners</h5>
               class="company-logo company-logo--wide"
             />
           </a>
+          <a href="https://blackjackonline21au.com/" target="_blank" rel="nofollow">
+            <img
+              src="img/blackjackonline-logo.png"
+              class="company-logo"
+            />
+          </a>
         </div>
         <div class="support-section sponsor-tiles sponsor-tiles--high">
           <h5>Community partners</h5>