Reduce the spacing between experiments in the ribbon (#1842)

Author: sroy3

webview/src/plots/components/ribbon/styles.module.scss

@@ -71,7 +71,7 @@
 .list {
   display: flex;
   align-items: center;
-  gap: 20px;
+  gap: 6px;
   border-bottom: 1px solid $border-color;
   padding: 10px 15px;
   margin: 0;