refactor: use de gruyter ci

frontend/static/degruyter-icons/Simple/Medium-24px/SVG/Action/Social/Social-Youtube-MD.svg

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="24px" height="24px" viewBox="0 0 24 24" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <title>🧩 Icons/Simple/Action/24px/Social/Social-Youtube-MD</title>
+    <g id="🧩-Icons/Simple/Action/24px/Social/Social-Youtube-MD" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <path d="M12.0003584,5.00024064 C12.0072931,5.00024635 12.0176212,5.00025777 12.0311952,5.00028062 L12.4597807,5.00219379 C13.9416848,5.01198809 18.4951773,5.07075392 19.7885402,5.42334886 C20.6512608,5.65670506 21.3251812,6.33035719 21.5586303,7.19273441 C22.2192074,9.85065921 22.0665692,14.0484623 21.571457,16.8089602 C21.3380079,17.6713374 20.6640875,18.3449895 19.801367,18.5783457 C19.2101154,18.739532 17.9375632,18.839314 16.5886018,18.9010838 L16.080341,18.9225113 C14.2971625,18.9915911 12.5126096,19.0002261 12.0943336,19.0013055 L11.9110851,19.0013055 C11.5326449,19.0003289 10.0357785,18.9931673 8.43341318,18.9406493 L7.92507763,18.9225113 C6.39663886,18.8633 4.86920977,18.7596803 4.20405171,18.5783457 C3.34133113,18.3449895 2.66741077,17.6713374 2.43396166,16.8089602 C1.76953655,14.1625748 1.95167625,9.96220743 2.42113492,7.20555604 C2.65458403,6.34317883 3.32850439,5.66952669 4.19122497,5.4361705 C5.5215411,5.07350141 10.3009413,5.01227156 11.6393349,5.00217873 L11.94857,5.00036507 C11.9757179,5.000264 11.9898826,5.00023493 11.9898826,5.00023493 Z M9.85714286,8.8506695 L9.85714286,15.1511431 L15.5714286,12.0009063 L9.85714286,8.8506695 Z" id="Primary" fill="#000000"></path>
+    </g>
+</svg>