Add the social icon for Firefish (#1294)

layouts/partials/svg.html

@@ -195,6 +195,10 @@
     stroke-linecap="round" stroke-linejoin="round">
     <path d="M18 2h-3a5 5 0 0 0-5 5v3H7v4h3v8h4v-8h3l1-4h-4V7a1 1 0 0 1 1-1h3z"></path>
 </svg>
+{{- else if (eq $icon_name "firefish") -}}
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor">
+    <path d="M16.21.088c-.256.114-.607.485-.7.735-.048.128-.075 1.322-.075 3.46 0 3.083.007 3.286.128 3.522.162.317.378.52.694.654.216.088.721.101 3.492.101 3.559 0 3.491.007 3.889-.411.37-.391.458-.897.256-1.396-.148-.344-6.228-6.45-6.605-6.632-.317-.148-.79-.162-1.079-.033ZM6.107.155C5.79.276 5.473.56 5.352.85c-.074.175-.095.857-.095 3.474 0 3.13.007 3.258.135 3.535.081.162.263.364.418.472l.276.196 3.303.02c3.269.02 3.303.013 3.6-.128.62-.297.882-1.12.565-1.734C13.42 6.43 7.354.337 7.111.21 6.86.081 6.383.054 6.107.155Zm-5.09 10.166a1.25 1.25 0 0 0-.889.695c-.121.263-.128.56-.128 6.139 0 5.842 0 5.869.142 6.166.087.175.256.364.417.472l.277.182 5.864.02c3.95.014 5.951 0 6.113-.054.33-.094.573-.297.755-.627l.148-.284v-5.835c0-4.627-.02-5.889-.087-6.085-.128-.364-.533-.701-.95-.789-.425-.088-11.203-.094-11.661 0zm3.095 6.982c.572.243 1.01.924 1.01 1.579a1.69 1.69 0 0 1-1.705 1.686c-.667 0-1.18-.303-1.496-.89a1.72 1.72 0 0 1 .23-1.957c.47-.54 1.26-.708 1.96-.418zm4.36.04c.162.075.398.257.526.412.944 1.106.169 2.813-1.28 2.813-1.247 0-2.083-1.282-1.557-2.395.242-.533.647-.85 1.287-1.005.23-.054.728.027 1.024.176zm8.028-7.029c-.378.068-.762.351-.923.689-.142.29-.142.37-.142 3.568 0 3.029.013 3.285.128 3.535.148.324.364.533.694.675.216.087.715.1 3.471.1 2.986 0 3.243-.013 3.492-.127.667-.31.97-1.12.647-1.748-.128-.25-6.457-6.624-6.578-6.624-.04 0-.176-.027-.304-.054a1.461 1.461 0 0 0-.485-.014z"/>
+</svg>
 {{- else if (eq $icon_name "flickr") -}}
 <svg role="img" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg" fill="currentColor">
     <path