fix(slides.js): ResizeObserver now only created if page window is resized

scripts/slides.js

@@ -34,6 +34,8 @@ rControl.addEventListener('click', () => {
     scrollSlide(currSlide);
 });
 
+window.addEventListener("resize", (event) => {
     new ResizeObserver(() => {
         scrollSlide(currSlide);
     }).observe(document.body);
+});
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