chore: update opencollective sponsors

Author: vkarpov15

index.pug

@@ -355,6 +355,12 @@ html(lang='en')
               <a rel="sponsored" href="https://www.gambledex.com/">
                 <img class="sponsor" src="https://codebarbarian-images.s3.amazonaws.com/gambedex.png" style="height: 100px">
               </a>
+              <a rel="sponsored" href="https://www.uudetkasinot.com/">
+                <img class="sponsor" src="https://images.opencollective.com/uudetkasinot-com/01a3658/logo/256.png" style="height: 100px">
+              </a>
+              <a rel="sponsored" href="https://www.vedonlyontibonukset.com/">
+                <img class="sponsor" src="https://images.opencollective.com/vedonlyontibonukset/69bffdc/logo/256.png" style="height: 100px">
+              </a>
             </div>
           </div>