Tweak bookmark button position in sidebar items (#21488)

frontend/src/metabase/nav/containers/MainNavbar/BookmarkList/BookmarkList.styled.tsx

@@ -19,6 +19,6 @@ export const SidebarBookmarkItem = styled(SidebarLink)`
     color: ${props =>
       props.isSelected ? color("text-white") : color("brand")};
     cursor: pointer;
-    margin-right: ${space(0)};
+    margin-top: 3px;
   }
 `;