Hide new icons from screen reader

tbx/project_styleguide/templates/patterns/atoms/icons/background-swirls.html

@@ -1,9 +1,9 @@
 
 {% comment %}
-This SVG doesn't work well when added to sprite.html,
+This SVG doesn't work well when added to sprites.html,
 so we've separated it into its own HTML file.
 {% endcomment %}
-<svg class="swirls__icon" width="100%" height="auto" viewBox="0 0 1512 1239" fill="none" xmlns="http://www.w3.org/2000/svg">
+<svg class="swirls__icon" width="100%" height="auto" viewBox="0 0 1512 1239" fill="none" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false">
     <g clip-path="url(#clip0_10543_57583)">
         <g opacity="0.3">
             <path d="M386.911 -1863.33C335.715 -1864.4 309.973 -1825.29 348.614 -1805.63C581.091 -1689.6 764.122 -1540.76 803.738 -1445.66L775.651 -1448.42C-1042.6 -1611.2 -2290.83 -901.081 -2671.39 -645.024C-2708.31 -620.893 -2672.23 -583.642 -2621 -592.488C-1932.47 -717.168 -1362.24 -589.766 -887.799 -219.967C-801.263 -150.001 -685.412 -71.2064 -566.404 -2.01501C-566.404 -2.01501 -429.339 80.8479 -231.715 165.694L-239.219 168.921C-599.844 266.335 -990.056 257.739 -1201.05 242.958C-1251.61 239.973 -1282.96 276.548 -1251.19 297.513C-1096.7 395.966 -773.901 570.438 -378.259 631.118C579.026 776.719 1691.37 519.197 2157.41 -65.5266C2179.36 -93.1108 2136.37 -119.145 2090.12 -105.844C1935.13 -65.5551 1730.9 -51.9129 1481.24 -76.4417C903.881 -133.165 153.197 -603.464 153.197 -603.464C153.197 -603.464 1156.42 -901.449 1733.77 -844.726C1986.56 -819.89 2169.32 -768.228 2288.96 -700.958C2324.48 -681.606 2381.36 -697.828 2377.71 -725.945C2323.13 -1343.97 1525.24 -1709.86 992.983 -1805.77C758.993 -1848.59 533.626 -1858.83 386.911 -1863.33Z" fill="var(--color--background-swirls-one)" style="mix-blend-mode:screen"/>